U, u
/ ju:; ju/ n (pl U's, u's / ju:z; juz/) the twenty-first letter of the English alphabet 英语字母表的第二十一个字母: `Ursula' begins with (a) U/`U'.  Ursula一字以U字母开始.
U-turn 
n  1 turn of 180 (by a car, etc) so as to face in the opposite direction without reversing （汽车等的）180转弯, 向後转, 掉头: No U-turns, ie as a sign on motorways, etc. 禁止後转弯（高速公路等的标牌用语）.  2 (idm 习语) do a `U-turn (infml 口) reverse one's policy 彻底改变政策: The government has done a U-turnon its economic policy. 政府的经济政策已经完全改变了.
U
/ ju:; ju/ adj (infml approv or joc 口, 褒或谑) thought to be characteristic of the upper class 视为上等阶层的; 有上流社会特徵的: very U behaviour 极具上流社会特徵的表现.
U
/ ju:; ju/ abbr 缩写 = (Brit) (of films) universal, ie suitable for anyone, including children （指电影）适合所有观众观看的（包括儿童）: a U film 老少皆宜的影片 * a U certificate 准予向所有观众放映的证明书.
U-boat
/ 5ju:bEUt; `ju9bot/ n (esp in World War II) Germansubmarine （尤指第二次世界大战中的）德国潜艇.
UAE
/ 9ju: eI 5i:; 9ju e `i/ abbr 缩写 = United Arab Emirates 阿拉伯联合酋长国.
UAR
/ 9ju: eI 5B:(r); 9ju e `Br/ abbr 缩写 = United Arab Republic 阿拉伯联合共和国.
ubiquitous
/ ju:5bIkwItEs; ju`bIkwEtEs/ adj [esp attrib 尤作定语] (fml or joc 文或谑) (seeming to be) present everywhere or in several places at the same time （似乎）普遍存在的, 无处不有的: Is there no escape from the ubiquitous cigarette smoke in restaurants? 餐厅里吸烟的烟雾就没有地方躲得过去吗? * ubiquitous traffic wardens 到处都是管违章停车的交通管理员.
ubiquity 
/ ju:5bIkwEtI; ju`bIkwEtI/ n [U] quality of being ubiquitous 普遍存在; 无处不有.
UCCA
/ 5QkE; `QkE/ abbr 缩写 = (Brit) Universities CentralCouncil on Admissions 大学统一招生委员会: fill in an UCCA form, ie with the subjects and universities chosen 填写大学统一招生委员会表格（选择专业及学校）.
UDA
/ 9ju: di: 5eI; 9ju di `e/ abbr 缩写 = Ulster Defence Association 北爱尔兰防务协会.
udder
/ 5QdE(r); `QdL/ n bag-like organ of a cow, female goat, etc, with two or more teats, which produces milk （母牛、 母羊等的）乳房. =>illus at cow 见 cow 插图.
UDI
/ 9ju: di: 5aI; 9ju di `aI/ abbr 缩写 = unilateral declaration of independence 单方面宣告独立.
UDR
/ 9ju: di: 5B:(r); 9ju di `Br/ abbr 缩写 = Ulster Defence Regiment 北爱尔兰防卫军.
UEFA
/ ju:5i:fE; ju`ifE/ abbr 缩写 = Union of European Football Associations 欧洲足球协会联合会: the UEFA cup 欧洲足联杯.
UFO (also ufo) 
/ 9ju: ef 5EU or, in informal use, 俗读作 5ju:fEU; 9ju Zf `o, `ju9fo/ abbr 缩写 = (pl ~s) unidentifiedflying object (esp a flying saucer) 不明飞行物（尤指飞碟）.
ugh
(usu suggesting a sound like / \:; \/  made with the lips either spread or rounded very strongly 通常指类似/ \:/的声音, 发音时双唇呈扁或圆形) interj (used to indicate disgust or horror, and usu accompanied by an appropriate facial expression 用以表示厌恶或恐惧, 通常伴有相应的面部表情): Ugh! You're eating snails! 喔唷, 你吃蜗牛啊!
ugli
/ 5QglI; `Q^lI/ n (pl ~s or ~es) (also `ugli fruit) mottled green and yellow W Indian citrus fruit, a hybrid of a grapefruit and a tangerine 丑橘（产於西印度群岛的黄绿杂色柑橘, 系葡萄柚与橘的杂交品种）.
ugly
/ 5QglI; `Q^lI/ adj (-ier, -iest)  1 unpleasant to look at or to hear 难看的; 难听的; 丑陋的: an ugly face, child,building 难看的脸、 小孩、 建筑物 * an ugly wound, gash,scar, etc 丑陋的伤口、 刀伤、 伤痕等 * the ugly screeching of parrots 鹦鹉那难听的尖叫声.  2 hostile or menacing; ominous 有敌意的; 阴险的; 不祥的: ugly threats, rumours, insinuations, etc 居心叵测的威胁、 谣言、 旁敲侧击等 *an ugly laugh, look, wink, etc 奸险的笑声、 表情、 眨眼等 * The situation in the streets was turning/growing ugly. 街上的情形越发不妙了. * The crowd was in an ugly mood. 群众已人心汹汹. * An ugly storm is brewing. 一场可怕的风暴即将来临.  3 (idm 习语) miserable/ugly as sin => sin. an ,ugly `customer (infml 口) person who is difficult, dangerous or unpleasant to deal with 难对付的人; 危险的人; 讨厌的人. an ,ugly `duckling person who at first seems unpromising but who later becomes much admired, very able, etc 丑小鸭（初时似无甚出息而後出人头地的人）.
ugliness 
n [U].
UHF
/ 9ju: eItF 5ef; 9ju etF `Zf/ abbr 缩写 =  (radio 无) ultra-high frequency 超高频. Cf 参看 VHF.
UHT
/ 9ju: eItF 5ti:; 9ju etF `ti/ abbr 缩写 = (of dairy products) ultra heat treated (for longer life) （指乳制品）经高温处理的: UHT milk 经高温消毒的牛奶.
UK
/ 9ju: 5keI; 9ju `ke/ abbr 缩写 = (esp in addresses) United Kingdom (of Great Britain and Northern Ireland) （尤用於通讯地址）（大不列颠及北爱尔兰）联合王国（即英国）: a UK citizen 英国公民. =>Usage at great 用法见great.
ukulele
/ 9ju:kE5leIlI; 9jukE`lelI/ n small four-stringed Hawaiian guitar similar to a banjo 尤克莱利琴（一种小型夏威夷四弦吉他, 形似班卓琴）: strumming tunes on his ukulele （他）用尤克莱利琴随便弹奏曲调.
ulcer
/ 5QlsE(r); `QlsL/ n open sore containing poisonous matter on the outside of the body or on the surface of an internal organ 溃疡: leg ulcers 腿部溃疡 * gastric ulcers 胃溃疡 * My mouth has an ulcer. 我的口腔出现了溃疡.
ulcerate 
/ 5QlsEreIt; `QlsL9et/ v [I, Tn] (cause sth to) become affected with an ulcer or ulcers （使某物）形成溃疡: Aspirin can ulcerate the stomach lining. 阿司匹林能造成胃壁溃疡.
ulceration 
/ 9QlsE5reIFn; 9QlsE`reFEn/ n: severe ulceration of the legs 腿部的严重溃烂.
ulcerous 
/ 5QlsErEs; `QlsLEs/ adj affected with or producing ulcers 溃疡的; 形成溃疡的.
ulna
/ 5QlnE; `QlnE/ n (pl -nae / -ni:; -ni/) (anatomy 解) inner and thinner of the two bones of the forearm inman; corresponding bone in an animal's foreleg or bird'swing 尺骨. =>illus at skeleton 见skeleton插图. Cf 参看 radius.
ulterior
/ Ql5tIErIE(r); Ql`tIrIL/ adj [attrib 作定语] (fml 文) beyond what is obvious or admitted 隐秘的; 别有用心的: This lever must serve some ulterior purpose. 这撬棒准是用於不可告人的目的的. * Jim had ulterior motives in buying me a drink  he wants to borrow my van. 吉姆请我喝酒是另有所图--他想借用我的客货车.
ultimate
/ 5QltImEt; `QltEmIt/ adj [attrib 作定语]  1 beyond which no other exists or is possible; last or final 达到极限的; 最後的; 终极的: the ultimate outcome, result,conclusion, etc 最终的结局、 结果、 结论等 * Managementmust take ultimate responsibility for the strike. 资方对此次罢工该负完全的责任. * Nuclear weapons are the ultimate deterrent. 核武器是终极的威慑力量.  2 from which everything else is derived; basic or fundamental 基本的; 根本的; 首要的: ultimate principles, questions, causes 基本原理、 问题、 原因 * the ultimate truths of philosophy and science 哲学和科学的基本原则.  3 (infml 口) that cannot be surpassed or improved upon; greatest 无法超越的; 极好的; 最大的: The ultimate luxury of the trip was flying in Concorde. 这一行程中最大的享受就是乘坐协和式飞机.
ultimate 
n [sing] the ~ (in sth) (infml 口) the greatest, most advanced, etc of its kind 最大的或最先进的事物: These ceramic tiles are the ultimate in modern kitchen design. 这种瓷砖是现代厨房装修中的极品.
ultimately 
adv  1 in the end; finally 最後; 终於: Ultimately, all the colonies will become independent. 所有的殖民地最终均将独立.  2 at the most basic level; fundamentally 根本; 基本上: All matter ultimately consistsof atoms. 一切物质从根本上说都是由原子组成的.
ultimatum
/ 9QltI5meItEm; 9QltE`metEm/ n (pl ~s or -ta / -tE; -tE/) final demand or statement of terms to be accepted without discussion, eg one sent to a foreign government and threatening war if the conditions are not accepted 最後通牒; 哀的美敦书: accept, reject, issue, deliver an ultimatum 接受、 拒绝、 发出、 送交最後通牒.
ultra-
pref 前缀 (used fairly freely with adjs 可用作较多形容词的前缀)  1 extremely; to excess 极端; 过分: ultra-conservative * ultra-fashionable.  2 beyond a specified limit, extent, etc 超过某一限度、 范围等: ultraviolet * ultra-high. Cf 参看 infra-.
ultramarine
/ 9QltrEmE5ri:n; 9QltrEmE`rin/ adj, n [U] (of a) brilliant pure blue 佛青色（的）.
ultrasonic
/ 9QltrE5sCnIk; 9QltrE`sBnIk/ adj (of sound waves) pitched above the upper limit of human hearing （指声波）超声（波）的.
ultrasound
/ 5QltrEsaUnd; `QltrE9saJnd/ n [U] sound withan ultrasonic frequency; ultrasonic waves 超声（波）: [attrib作定语] an ultrasound scan, eg to detect abnormality in a foetus 超声波扫描检查（如可用以检查胎儿是否畸形）.
ultraviolet
/ 9QltrE5vaIElEt; 9QltrE`vaIElIt/ adj [usu attrib通常作定语]  1 (physics 物) (of radiation) with a wavelengththat is just beyond the violet end of the visible spectrum （指辐射）紫外的: ultraviolet rays, ie causing sun-tanning 紫外线.  2 of or using such radiation 紫外线的; 利用紫外线的: an ultraviolet lamp 紫外线灯 * ultraviolet treatment, ie for skin diseases 紫外线疗法（用以治疗皮肤病）. Cf 参看 infra-red (infra).
ululate
/ 5ju:ljUleIt; `juljE9let/ v [I] (fml 文) howl or wail 嚎叫; 哀号. 
ululation 
/ -leIFn; -leFEn/ n [U, C]: the ululations of the mourning women 女子哀悼中的恸哭.
umber
/ 5QmbE(r); `QmbL/ n [U] natural colouring-matter similar to ochre but darker and browner 棕土, 赭土（一种深棕色天然颜料）: burnt umber, ie reddish-brown pigment 烧棕土（一种红棕色颜料）.
umber 
adj yellowish or reddish-brown 黄棕色的; 红棕色的.
umbilicus
/ Qm5bIlIkEs; also, in medical use, 作医学用语时读作 9QmbI5laIkEs; Qm`bIlIkEs, 9QmbI`laIkEs/ n (anatomy 解) navel 脐.
umbilical 
/ Qm5bIlIkl; also, in medical use, 作医学用语时读作 9QmbI5laIkl; Qm`bIlIkl/ adj of, near or concerning the umbilicus 脐的; 近脐的; 与脐相关的.
umbilical cord 
flexible tube of tissue connecting the placenta to the navel of the foetus and carryingnourishment to it before birth 脐带: (fig 比喻) By leavingmy parents' home, I cut/broke the umbilical cord. 我离开父母开始自立.
umbra
/ 5QmbrE; `QmbrE/ n (pl -rae / -ri:; -ri/ or ~s) (astronomy 天) dark central part of the shadow cast by the earth or the moon in an eclipse, or of a sunspot 本影. Cf 参看 penumbra.
umbrage
/ 5QmbrIdV; `QmbrIdV/ n (idm 习语) give `umbrage; take `umbrage (at sth) (fml or joc 文或谑) (make sb) feel offended or slighted （使某人）感到受到了冒犯或怠慢: I invited her because I was afraid of giving umbrage. 我邀请了她, 因为我怕得罪她. * He took umbrage at my remarks and left. 他觉得我的话伤了他的感情, 便离开了.
umbrella
/ Qm5brelE; Qm`brZlE/ n  1 folding frame of spokes attached to a stick and handle and covered with fabric, used to shelter a person from rain 伞; 雨伞: put up/take down an umbrella 把伞张开[合起]. Cf 参看 parasol, sunshade (sun).  2 (fig 比喻) any kind of general protecting force or influence 起保护作用的力量或势力: sheltering under the American nuclear umbrella在美国核保护伞的庇护下 * Police operated under the umbrella of the security forces. 警方在保安部队的掩护下采取了行动.  3 [esp attrib 尤作定语] (fig 比喻) central controlling agency for a group of related companies: 企业集团的中央管理机构 * an umbrella organization, group, project 作为中央管理机构的组织、 作为中央管理机构的团体、 总项目.
umlaut
/ 5UmlaUt; `JmlaJt/ n (a) [U] (in Germanic languages) vowel change in related forms of a word, shown by two dots over the vowel in one of them, eg der Mann/die Manner (= the man/the men) in German （日耳曼语系中的）元音变化（在元音上加两点作为标志, 如德语中的 der Mann/die Manner）. (b) [C] sign (consistingof two dots) that shows this 变音符（标示上述元音变化的两点）. Cf 参看 diaeresis.
umpire
/ 5QmpaIE(r); `QmpaIr/ n (a) (in tennis, cricket, etc) person appointed to see that the rules are observed and to settle disputes （网球、 板球等的）裁判员. =>illusat baseball, cricket, tennis 见baseball、 cricket、 tennis插图. (b) person chosen to act as a judge between two parties who disagree 仲裁人; 公断人. Cf 参看 referee.
umpire 
v [I, Tn] act as umpire in (a game, etc) 在（比赛等中）当裁判、 仲裁人或公断人: umpire a match, competition, dispute 在比赛中当裁判、 在竞争中当公断人、 在争端中当仲裁人.
umpteen
/ 5Qmpti:n; `Qmp`tin/ pron, det (infml 口) too many to count; numerous 数不清的; 无数的: Umpteen of them left. 他们许多人都走了. * have umpteen reasons for being late 迟到有许多理由. 
umpteenth 
/ 5Qmpti:nW; `Qmp`tinW/ pron, det: For the umpteenth time, I tell you I don't know! 我告诉你多少次了, 我不知道!
un
/ En; En/ pron (infml 口) one 人; 事物: That's a good 'un! eg a good photograph, joke, excuse. 那个可真好! （如照片、 玩笑、 藉口等） * He went fishing and caught a big 'un. 他去钓鱼, 钓到一条大的.
un-
pref 前缀  1 (with adjs, advs and ns 与形容词、 副词和名词结合) not 不; 非: unable * unconsciously * untruth.2 (a) (with vs forming vs 与动词结合构成动词) reverse or opposite of 相反; 对立: unlock * undo. (b) (withns forming vs 与名词结合构成动词) remove from or deprive of 移走; 免去: unearth * unmask * unhorse.
un-
NOTE ON USAGE 用法: Compare the negative prefixes non-, un-, dis- and a-. 试比较含否定意义的前缀n on-、un-、 dis-、 a-.  1 Non- and un- are the most freelyadded prefixes. *non-和un-在使用上最为自由. Non-is used with nouns, adjectives and adverbs and indicates an absence of something *non-附加在名词、 形容词、 副词前, 表示没有或不存在某事物: a non-drinker 不喝酒的人 * a non-stick pan 不粘底的锅 * speaking non-stop说个不停. Un- is added to adjectives and indicates the opposite quality from the simple word *un-附加在形容词前, 表示与原词相反的意义: unexpected = `surprising'（没有料到的） * unwise = `foolish' （愚蠢的）. Compare non-British (`of a nationality which is not British') andun-British (`being disloyal to Britain'). 试比较non-British（非英国籍的）和un-British（不忠於英国的）.  2 In- is used with fewer words than un-, also to form opposites. *in-也用以构成反义词, 但能与之结合的词较un-少些. There are variant spellings 这一前缀有几种拼写形式: il- before l (illogical); im- before b, m, p (imbalance, immaterial, impossible) and ir- before r (irresponsible).*il-用於l之前（illogical）; im-用於b、 m、 p之前（imbalance、 immaterial、 impossible）; ir-用於r之前（irresponsible）.  3 Dis- is also used with verbs, adjectives and nouns to form opposites *dis-亦用於动词、 形容词、 名词之前, 构成反义词: dislike 不喜欢 * disobedient 不服从的 * distrust 不信任.  4 A- is mostly used in formal or technical words to indicate `lacking in' or `lack of' *a-主要用在较文的词或科技词之前, 表示｀缺乏＇或｀无＇: amorphous (`lacking in shape') 无定形的 * anarchy (`lack of rule') 无政府状态.  5 It is not possible to predict whether un-, in- or dis- is used with a particular word and the correct form must be noted and learned 一个词的前缀究竟是用un-、 in-还是dis-是没有固定规律可循的, 只好留心逐一记住.
UN
/ 9ju: 5en; 9ju `Zn/ abbr 缩写 = United Nations 联合国: the UN Secretary General 联合国秘书长.
un-American
/ 9QnE5merIkEn; 9QnE`mZrIkEn/ adj  1 againstwhat are thought to be normal American customs orvalues 非美国的; 不合美国风俗习惯或价值观念的: Statecontrol is a very un-American notion. 实行国家控制是根本违背美国观念的.  2 against the political interests of the USA 违反美国政治利益的; 反美的; 非美的: un-American activities, eg spying 非美活动（如针对美国的间谍活动）.
unabashed
/ 9QnE5bAFt; 9QnE`bAFt/ adj (fml or joc 文或谑) not ashamed, embarrassed or awed, esp when there is reason for being so 不害羞的, 不难为情的, 无敬畏之心的（尤指有原因令人害羞、 难为情等时）: Tim appearedunabashed by all the media attention. 蒂姆成了传播媒介的焦点, 却也满不在乎.
unabated
/ 9QnE5beItId; 9QnE`betId/ adj [usu pred 通常作表语] (of a storm, an argument, a crisis, etc) as strong,violent, serious, etc as before （指风暴、 论争、 危机等）仍然强烈、 猛烈、 严重等, 并未消减: The gales continuedunabated. 风势毫未稍减. * Our enthusiasm remained unabated. 我们的热情一如既往.
unable
/ Qn5eIbl; Qn`ebl/ adj [pred 作表语] ~ to do sth (esp fml 尤作文雅语) not having the ability, opportunity or authority to do sth 没有做某事的能力、 机会或权力: She is unable to walk. 她不能行走. * I tried to contact him but was unable to. 我竭力想与他联系, 但是没联系上.
unabridged
/ 9QnE5brIdVd; 9QnE`brIdVd/ adj (of a novel, play, speech, etc) published, performed, etc without being shortened in any way （指小说、 戏剧、 讲话等）未删节的, 完整的: unabridged editions/versions of `War and Peace' 《战争与和平》的全文版本.
unacceptable
/ 9QnEk5septEbl; 9QnEk`sZptEbl/ adj that cannot be accepted, approved or forgiven 不能接受的;不能赞同的; 不能原谅的: unacceptable terms, suggestions,arguments, solutions 不能接受的条件、 建议、 论点、 解决办法 * Imprisonment without trial is totally unacceptablein a democracy. 在民主政体中, 不经审讯而监禁是不允许的.
unacceptably 
/ -blI; -blI/ adv: unacceptably low standards 无法接受的低标准.
unaccompanied
/ 9QnE5kQmpEnId; 9QnE`kQmpEnId/ adj  1 (fml 文) without a companion; unescorted 无伴的; 无陪伴的: Children unaccompanied by an adult will not be admitted. 儿童无成人带领不得入内. * unaccompanied luggage/baggage, ie travelling separately from its owner 托运的行李.  2 (music 音) performed without an accompaniment 无伴奏的: sing unaccompanied 无伴奏演唱.
unaccountable
/ 9QnE5kaUntEbl; 9QnE`kaJntEbl/ adj  1 that cannot be explained or accounted for 无法解释的; 难以说明的: an unaccountable increase in cot deaths, ie of babies 难以解释的婴儿猝死数量上升的现象 * For some unaccountable reason, the letter never arrived. 不知何故, 那封信始终未收到.  2 ~ (to sb/sth) (fml 文) not answerable for one's actions, etc; not accountable （对自己的行为等）不必负责任的, 无责任的.
unaccountably 
/ -EblI; -EblI/ adv inexplicably 难以说明地; 莫名其妙地: unaccountably absent from the meeting 无缘由未到会.
unaccounted
/ 9QnE5kaUntId; 9QnE`kaJntId/ adj [pred 作表语] ~ for (a) not included in an account, a tally, etc 未包括在某数目、 帐目等中: One passenger is still unaccounted for. 仍有一个旅客未在其中. (b) not explained 未予解释的; 未加说明的: His disappearance is unaccounted for. 他失踪原因不明.
unaccustomed
/ 9QnE5kQstEmd; 9QnE`kQstEmd/ adj  1 ~to sth not in the habit of doing sth; not used to sth 不习惯的; 不适应的: Unaccustomed as I am to public speaking...本人并不习惯於当众讲话....  2 uncharacteristic or unusual 不寻常的; 不一般的: his unaccustomed silence 他那罕有的沉默 * the unaccustomed luxury of cheap foreign travel 廉价国外旅游中难得的享受.
unacknowledged
/ 9QnEk5nClIdVd; 9QnEk`nBlEdVd/ adj not fully recognized or appreciated 未得到充分认可、 赏识或感谢的: an unacknowledged master of his craft 在他这行手艺中未受到赏识的大师 * Her contribution to the research went largely unacknowledged. 她在这项研究中的贡献大都没有获得承认.
unadopted
/ 9QnE5dCptId; 9QnE`dBptId/ adj (Brit) (of a road) not taken over for maintenance by a local authority （指道路）未经地方当局承担保养的.
unadulterated
/ 9QnE5dQltEreItId; 9QnE`dQltE9retId/ adj  1 (esp of food) not mixed with other substances; pure （尤指食物）不搀其他物质的, 纯的.  2 [usu attrib 通常作定语] (infml 口) complete or utter 完全的; 十足的: talking pure unadulterated nonsense 纯粹胡说八道 * unadulterated bliss 极幸福.
unaffected
/ 9QnE5fektId; 9QnE`fZktId/ adj  1 ~ (by sth) not changed or affected (by sth) 无变化的; 不受影响的: rights unaffected by the new laws 不受新法规影响的权利* The children seem unaffected emotionally by their parents'divorce. 孩子在情绪上似乎未受到父母离婚的影响.  2 free from affectation; sincere 不矫揉造作的; 真挚的: welcome sb with unaffected pleasure 以发自内心的喜悦欢迎某人.
unalloyed
/ 9QnE5lRId; 9QnE`lRId/ adj (fml 文) not mixed,eg with negative feelings; pure 不混杂的（如无不快的感情等）; 纯粹的: ,unalloyed `joy, enthusiasm, excitement, etc 真正的欢乐、 热情、 兴奋等.
unanimous
/ ju:5nAnImEs; ju`nAnEmEs/ adj (a) ~ (in sth) all agreeing on a decision or an opinion 一致同意的: The villagers are unanimous in their opposition to the building of a bypass. 村民一致反对修建旁道. (b) (of a decision, an opinion, etc) given or held by everybody （指决定、 意见等）一致做出的, 一致通过的: He was elected by a unanimous vote. 他以全票当选. * The proposal was accepted with unanimous approval. 全体一致通过了那项建议.
unanimity 
/ 9ju:nE5nImEtI; 9junE`nImEtI/ n [U] complete agreement or unity 一致同意; 全体一致.
unanimously 
adv.
unannounced
/ 9QnE5naUnst; 9QnE`naJnst/ adj without prior warning or notification; unexpected 未事先宣布的; 未通知的; 突如其来的: make unannounced safety checks on equipment 对设备进行突然的安全检查 * He arrived unannounced. 他未事先通知而来到.
unanswerable
/ 9Qn5B:nsErEbl; ?@ 9Qn5An-; Qn`AnsErEbl/ adj that cannot be answered or refuted by a good argument to the contrary 无法回答的; 无可辩驳的: His case/defence is unanswerable. 他的辩解无懈可击.
unapproachable
/ 9QnE5prEUtFEbl; 9QnE`protFEbl/ adj (of a person) difficult to talk to (because too stiff,formal, etc) （指人）（因太古板、 拘谨等）难以接近的, 不易与之谈话的.
unarmed
/ 9Qn5B:md; Qn`Brmd/ adj (a) without weapons 无武器的; 未武装的: Britain is proud of its unarmed police force, ie that does not carry guns. 英国引以自豪的是警察不携带武器. * He walked into the camp unarmed. 他走进战俘营中, 身上未带任何武器. (b) not using weapons 不使用武器的: soldiers trained in unarmed combat 受过徒手格斗训练的士兵.
unashamed
/ 9QnE5FeImd; 9QnE`Femd/ adj feeling or showing no guilt or embarrassment 无羞耻心的; 不觉难堪的: They kissed each other with unashamed delight. 他们愉快地相吻, 并不觉得难为情.
unashamedly
/ 9QnE5FeImIdlI; 9QnE`FemIdlI/ adv: unashamedly pursuing her own interests 厚著脸皮追求她自己的利益.
unasked
/ 9Qn5B:skt; ?@ 9Qn5Askt; Qn`Askt/ adj without being asked or invited 未被问及的; 未经邀请的: The meeting ended and the all-important question remained unasked. 会议结束了, 重要的问题都未提出来. * She came to the party unasked. 她未经邀请而来参加聚会.
unasked for 
without being asked for or requested 未经要求的; 未经请求的; 主动的: [attrib 作定语] unasked-for (ie voluntary) contributions to the fund 为筹集基金的主动捐赠.
unassailable
/ 9QnE5seIlEbl; 9QnE`selEbl/ adj (a) that cannot be attacked or conquered 攻不破的; 不可征服的:an unassailable stronghold, fortress, etc 攻不破的堡垒、 要塞等 * Liverpool have (built up) an unassailable lead at the top of the First Division. 利物浦队高居甲级队之首, 所向无敌. (b) (fig 比喻) that cannot be questioned or refuted 不容置疑的; 无可辩驳的: Her position/argument is unassailable. 她的立场[论点]是无懈可击的.
unassuming
/ 9QnE5sju:mIN; ?@ 9QnE5su:-; 9QnE`sumIN/ adj not drawing attention to oneself or to one's merits or rank; modest 不爱表现自己的; 不爱显示或夸耀的; 谦逊的: a gentle, quiet and unassuming manner 高雅、 文静而谦逊的态度. 
unassumingly 
adv.
unattached
/ 9QnE5tAtFt; 9QnE`tAtFt/ adj  1 not connected with or belonging to a particular body, group, etc （与某团体、 组织等）无关系的, 非附属的: people unattached to any political organization 同任何政治组织无联系的人们.  2 not married or engaged; without a regular companion 未结婚的; 未订婚的; 无固定伴侣的.
unattended
/ 9QnE5tendId; 9QnE`tZndId/ adj  1 with its owner not present 物主不在场的: unattended vehicles, suitcases, etc causing suspicion 无主车辆、 手提箱等令人生疑.  2 ~ (to) not supervised or given care or attention 无人看管的; 无人照料的: leave the shop-counter,telephone, etc unattended 柜台、 电话等无人照管 * They left the baby at home unattended all evening. 他们把那婴儿留在家里, 整晚无人照料. * old correspondence still unattended to 仍未答覆的旧信件.
unavailing
/ 9QnE5veIlIN; 9QnE`velIN/ adj without effect or success; futile 徒劳的; 无效的; 白费的: unavailing efforts/attempts to stop smoking 戒烟而未戒成 * All our protests were unavailing. 我们所有的反对意见都毫无作用.
unavoidable
/ 9QnE5vRIdEbl; 9QnE`vRIdEbl/ adj that cannotbe avoided 不可免除的: unavoidable duties 不可推卸的责任. 
unavoidably 
/ -EblI; -EblI/ adv: unavoidably absent/delayed 不得已而缺席[耽搁].
unaware
/ 9QnE5weE(r); 9QnE`wZr/ adj [pred 作表语] ~ (of sth/that...) ignorant or not conscious of sth 不知道; 未觉察: be socially, politically, etc unaware 对社会、 政治等问题不了解 * He was unaware of my presence/that I was present. 他不知道我在场. * (fml 文) I am not unaware of the problem. 我并非不了解这一问题.
unawares 
/ -5weEz; -`wZrz/ adv  1 by surprise; unexpectedly 吃惊地; 未料到地: She came upon him unawares as he was searching her room. 她撞见他正在搜查她的房间.  2 without being aware; unconsciously 不知不觉地; 无意地: I must have dropped my keys unawares.我准是不留神把钥匙丢了.  3 (idm 习语) catch/take sb una`wares surprise or startle sb 使某人吃惊; 把某人吓一跳: You caught us unawares by coming so early. 你来得这麽早, 我们都很惊讶.
unbalance
/ 9Qn5bAlEns; Qn`bAlEns/ v [I, Tn] upset the balance of (sb/sth) 使（某人[某事物]）失去平衡; 使（某人）精神紊乱: Her death had an unbalancing effecton Joe, ie on his mind. 她一死, 乔在精神上打击很大.* Over-production is seriously unbalancing the EEC economy. 因生产过剩, 欧洲共同体经济严重失衡.
unbalanced 
adj  1 [esp pred 尤作表语] (of a person, his mind, etc) insane, abnormal or eccentric （指人、 精神等）发狂、 不正常或古怪: mentally unbalanced 精神错乱 * He shot her while temporarily unbalanced. 他一时精神失常向她开了枪.  2 [esp attrib 尤作定语] (of opinions, etc) giving too much or too little emphasis to a particular idea, etc; biased （指见解等）失去分寸的, 片面的, 偏颇的: the unbalanced reporting of the popular tabloids 通俗小报上片面的报道.
unbar
/ 9Qn5bB:(r); Qn`bBr/ v (-rr-) [Tn] remove bars from (a door, gate, etc) to allow entry 拉开（门等）的闩: (fig 比喻) unbar the way to a nuclear-free world 扫除通向无核世界的障碍.
unbearable
/ Qn5beErEbl; Qn`bZrEbl/ adj that cannot be tolerated or endured 难以忍受的; 不能容忍的: I find his rudeness unbearable. 我觉得他粗暴无礼难以忍受.
unbearably 
/ -EblI; -EblI/ adv: unbearably hot, painful,selfish 热得、 痛得、 自私得叫人受不了.
unbeatable
/ 9Qn5bi:tEbl; 9Qn`bitEbl/ adj that cannot be defeated or surpassed 不可战胜的; 难以超越的: The Brazilian team is regarded as unbeatable. 巴西队可以说是不可战胜的. * unbeatable prices, discounts, offers, etc 竞争不过的价格、 折扣、 出价等 * unbeatable value 无与伦比的价值.
unbeaten
/ 9Qn5bi:tn; Qn`bitn/ adj not having been beaten, defeated or surpassed 未被打破、 击败或超过的: an unbeaten team 战无不胜的队 * an unbeaten record for the high jump 未打破的跳高记录 * His time of 3 min 2 sec remains unbeaten. 他那3分2秒的记录仍未打破.
unbecoming
/ 9QnbI5kQmIN; 9QnbI`kQmIN/ adj (fml 文)  1 not suited to the wearer 不适合穿用者的; 不合身的: an unbecoming dress, style, colour 不合适的连衣裙、 样式、 颜色.  2 ~ (to/for sb) not appropriate or seemly; improper 不适当的; 不得体的: conduct unbecoming to an officer and a gentleman 与官员和绅士身分不相称的行为 * It was thought unbecoming for young ladies to smoke. 年轻女子吸烟被认为有欠斯文.
unbelief
/ 9QnbI5li:f; 9QnbI`lif/ n [U] (fml 文) lack of belief or state of not believing, esp in God, religion, etc 无信仰; 不信; （尤指）不信上帝、 宗教等. Cf 参看 disbelief (disbelieve).
unbelievable 
/ 9QnbI5li:vEbl; 9QnbI`livEbl/ adj that cannot be believed; astonishing 不可信的; 难以置信的; 惊人的: unbelievable expense, skill, luck 惊人的费用、 技艺、 幸运. Cf 参看 incredible.
unbelievably 
/ -EblI;-EblI/ adv: unbelievably hot, cheap, stupid 热得、 便宜得、 愚蠢得难以置信.
unbeliever 
n person who does not believe, esp in God, religion, etc 无信仰者; 不信者; （尤指）不信上帝、 宗教等的人.
unbelieving 
adj not believing; doubting 不信的; 怀疑的: She stared at me with unbelieving eyes. 她以怀疑的眼光注视著我. Cf 参看 incredulous.
unbend
/ 9Qn5bend; Qn`bZnd/ v (pt, pp unbent / 9Qn5bent; Qn`bZnt/)  1 [I, Tn] (cause sth/sb to) become changed from a bent position; straighten （使某物[某人]）由弯变直, 弄直, 挺直.  2 [I] (fig 比喻) become relaxed and informal in behaviour 变得轻松和随便: Most professors unbend outside the lecture theatre. 教授在课下大都很随便.
unbending 
adj (esp derog 尤作贬义) refusing to alter one's demands, decisions, etc; inflexible 不改变初衷、 决定等的; 顽固的: the government's unbending attitude towards the strikers 政府对待罢工的人的顽固态度.
unbidden
/ 9Qn5bIdn; Qn`bIdn/ adv (fml 文)  1 not requested, invited or ordered 未被要求; 未经邀请;非受命: walk in, help unbidden 擅自进入[主动帮助].2 (fig 比喻) voluntary or spontaneous 自愿的; 自发的: memories, images, names, etc coming unbidden to one's mind 不由自主地呈现於脑际的往事、 形象、 名字等.
unblushing
/ 9Qn5blQFIN; Qn`blQFIN/ adj (fml 文) shameless不知羞耻的; 无耻的: an unblushing admission of guilt 厚颜无耻的认罪. 
unblushingly 
adv.
unborn
/ 9Qn5bR:n; Qn`bRrn/ adj [esp attrib 尤作定语] not yet born; of the future 未出生的; 未来的: unborn children, calves 未出生的孩子、 小牛 * generations as yet unborn 未来的世代.
unbounded
/ 9Qn5baUndId; Qn`baJndId/ adj without limits; boundless 无限的; 无边际的: unbounded ambition, curiosity, luxury 极大的抱负、 好奇心、 奢侈.
unbowed
/ 9Qn5baUd; Qn`baJd/ adj not conquered or subdued 不屈服的: He remains bloody but unbowed, ie He has suffered but not submitted. 他血流不止, 但是不屈服.
unbreakable
/ 9Qn5breIkEbl; 9Qn`brekEbl/ adj that cannotbe broken 打不破的; 不破碎的: unbreakable plastics, toys 不碎的塑料制品、 玩具 * (fig 比喻) the unbreakable spirit of the resistance 不屈不挠的抵抗精神.
unbridled
/ 9Qn5braIdld; Qn`braIdld/ adj [esp attrib 尤作定语] not controlled or checked 不受控制的; 不加约束的: unbridled passion, enthusiasm, jealousy, etc 抑制不住的激情、 热情、 忌妒心等 * (dated 旧) speak with anunbridled tongue, ie passionately, insolently or indiscreetly信口开河. Cf 参看 bridle v 2.
unbroken
/ 9Qn5brEUkEn; Qn`brokEn/ adj  1 not interruptedor disturbed 未间断的; 未受打扰的: ten hours of unbrokensleep 连续十小时的睡眠 * the unbroken silence of the woods 林中无边的静寂.  2 (of records in sport, etc) not beaten or surpassed （指体育运动记录等）未被打破的, 未超过的.  3 (of a horse, etc) not tamed or subdued （指马等）未驯化的, 不驯服的.
unbuckle
/ 9Qn5bQkl; Qn`bQkl/ v [Tn] loosen or undo the buckle(s) of (a belt, etc) 松开或解开（带子等）的搭扣.
unburden
/ 9Qn5b\:dn; Qn`b[dn/ v [Tn, Tn.pr] ~ oneself/sth (of sth) (to sb) (fml fig 文, 比喻) relieve (oneself, one's mind, etc) of worry, etc, eg by talkingabout one's troubles to a friend 解除（自己、 内心等）的烦恼等（如向友人诉说苦衷）: unburden one's heart, conscience,etc 解除心灵上、 良心上...的负担 * unburden oneself of a secret 说出秘密以放下压在心头的包袱.
unbusinesslike
/ 9Qn5bIznIslaIk; 9Qn`bIznIs9laIk/ adj unsystematic or lacking professionalism, esp in business matters 无条理的, 无章法的（尤指业务方面）: unbusinesslike methods, transactions, attitudes 不守业务规矩的方法、 交易、 态度 * It is unbusinesslike to arrive late for meetings. 开会迟到不是办正事的态度.
unbutton
/ 9Qn5bQtn; Qn`bQtn/ v [Tn] undo the buttons of (a jacket, etc) 解开（上衣等）的钮扣.
unbuttoned 
adj (fig 比喻) (feeling) free fromformality; relaxed 无拘束（感）的; 松弛的: her unbuttonedstyle of management 她放开手的管理方式.
uncalled-for
/ Qn5kR:ld fR:(r); Qn`kRld9fRr/ adj unjustified; unnecessary 无理由的; 不必要的: uncalled-for impertinence没来由的无礼举动 * Your comments were quite uncalled-for. 你提的意见很无道理.
uncanny
/ Qn5kAnI; Qn`kAnI/ adj (-ier, -iest) (a) unnatural 异乎寻常的: The silence was uncanny. 静得出奇. * I had an uncanny feeling of being watched. 我有一种奇怪的感觉, 好像有人监视我. (b) beyond what is normal or expected; extraordinary 超常的; 出乎意料的; 非凡的: an uncanny coincidence, resemblance, etc 意料不到的巧合、 相似等. 
uncannily 
/ -IlI; -IlI/ adv: an uncannily accurate prediction 异常准确的预言.
uncared-for
/ 9Qn5keEd fR:(r); Qn`kZrd9fRr/ adj not lookedafter; neglected 无人照顾的; 被忽视的: uncared-for children, gardens, pets 没人照料的孩子、 花园、 宠物.
unceasing
/ 9Qn5si:sIN; Qn`sisIN/ adj going on all thetime; incessant 不停的; 不断的; 持续的: unceasing efforts,protests, campaigns 持续不断的努力、 抗议、 运动 * nursing him with unceasing devotion 时时刻刻地精心照料他. 
unceasingly 
adv.
unceremonious
/ 9Qn9serI5mEUnIEs; 9QnsZrE`monIEs/ adj  1 (a) without proper formality or dignity 无正规形式的; 不很庄重的: Their divorce was an unceremoniousaffair. 他们离婚没有庄重的形式. (b) without ceremony; informal 不拘礼节的; 非正式的; 随便的: The dinner was a relaxed, unceremonious occasion. 那次宴会很轻松, 随随便便.  2 lacking in courtesy or politeness; rudely abrupt 不客气的; 无礼貌的; 粗鲁的; 唐突的: his unceremonious departure, dismissal, removal, etc 他唐突离去、 遭解雇、 遭免职等.
unceremoniously 
adv (derog 贬): I was escorted unceremoniously to the door. 很无礼地把我逐出门外.
uncertain
/ Qn5s\:tn; Qn`s[tn/ adj  1 (a) [usu pred 通常作表语] ~ (about/of sth) not knowing definitely 知道得不确切; 无把握: be/feel uncertain (about) what to do 对要做什麽事拿不定主意 * uncertain about/of one's legal rights 不明确自己的合法权利. (b) not known definitely 未被确切了解: The outcome is still uncertain. 结果仍不明朗.  2 not to be depended on; unreliable 靠不住; 不可信赖: His aim is uncertain. 他的目标不明确.  3 likely to vary; changeable 可能改变; 常变化: uncertain weather 变幻莫测的天气 * a man of uncertain temper 喜怒无常的人.  4 hesitant or tentative 犹豫; 迟疑不决: an uncertain voice, smile 吞吞吐吐的说话声、 似笑非笑 * the baby's first uncertain steps 婴儿初学行走时不稳的脚步.  5 (idm 习语) in ,no un,certain `terms clearly and forcefully 清楚而有力地: I told him what I thought of him in no uncertain terms! 我毫不含糊地把我对他的看法告诉了他!
uncertainly 
adv hesitantly 犹豫地; 迟疑地: speak, wait uncertainly 吞吞吐吐地说、 左右为难地等候.
uncertainty 
/ Qn5s\:tntI; Qn`s[tntI/ n (a) [U] state of being uncertain 无把握; 不确定; 变化不定; 犹豫: The uncertainty is unbearable! 事情定不下来难以忍受! (b) [C esp pl 尤作复数] thing which is uncertain 无把握、 不确定或变化不定的事物: the uncertainties of life on the dole, ie as an unemployed person 依靠救济金生活的不安定.
uncharitable
/ 9Qn5tFArItEbl; Qn`tFArEtEbl/ adj severe orharsh, esp in judging (the conduct of) others 无慈悲心的, 严厉的, 苛刻的（尤指评判他人行为时）: uncharitableremarks, thoughts, etc 不厚道的话、 想法等 * I don't want to be uncharitable, but she's not a terribly good cook. 我并不想苛求别人, 但她烹调的手艺也实在不敢恭维. 
uncharitably 
/ -EblI; -EblI/ adv.
uncharted
/ 9Qn5tFB:tId; Qn`tFBrtId/ adj  1 not marked on a map or chart 图上未标明的: an uncharted island 地图上没有标明的岛.  2 not explored or mapped 未经勘测的; 未绘制成图的: an uncharted area, zone, etc 未经勘探的地区、 地带等 * (fig 比喻) the uncharted depths ofhuman emotions 未经探究的人的感情深处 * Our researchis sailing into uncharted waters/seas, ie investigating fieldsthat have not been researched before. 我们的研究工作正深入到从未涉及过的领域.
unchecked
/ 9Qn5tFekt; Qn`tFZkt/ adj (derog 贬) not resistedor restrained 不受抑制的; 未加约束的: the enemy's unchecked advance 敌军未受阻遏向前推进 * rumours spreading unchecked 广为流传而未受制止的谣言 * The use of credit continues/grows unchecked. 信用贷款不断增加而未受限制.
unchristian
/ 9Qn5krIstFEn; Qn`krIstFEn/ adj contrary to Christian teachings or principles; uncharitable 违反基督教教义或信条的; 无慈悲心的: unchristian behaviour 有悖基督教教义的行为 * an unchristian attitude 不仁厚的态度.
uncivil
/ 9Qn5sIvl; Qn`sIvl/ adj ill-mannered; rude 不文明的; 失礼的; 粗鲁的: be uncivil to the neighbours 对邻居不礼貌 * It was uncivil of you to say that. 你说那种话很失礼. Cf 参看 incivility 1.
uncle
/ 5QNkl; `QNkl/ n  1 (a) brother of one's father or mother; husband of one's aunt 伯父; 叔父; 舅父; 姑父; 姨父: my uncle Jim 我的吉姆叔叔. =>App 8 见附录8. (b) man whose brother or sister has a child 当叔父、 伯父、 舅父、 姑父或姨父的人: Now you're an uncle. 现在你当上叔叔了.  2 (infml 口) (used by children, esp in front of a first name 用作儿语, 尤用於名前) unrelated adult male friend, esp of one's parents 无亲戚关系的成年男姓朋友（尤指父母的朋友）; 叔叔; 伯伯.  3 (idm 习语) bob's your uncle => bob4. talk like a Dutch uncle => talk2.
Uncle Sam 
(infml 口) (people or Government of) the United States 山姆大叔; 美国; 美国人; 美国政府: fighting for Uncle Sam 为美国而战.
Uncle Tom 
(US infml derog 口, 贬) black person who associates with and is eager to please white people 汤姆大伯（与白人交往并竭力讨白人欢心的黑人）.
unclean
/ 9Qn5kli:n; Qn`klin/ adj (a) (of food) that cannot be eaten; forbidden as spiritually impure （指食物）不宜食用的, 按教规认为不洁净而禁止食用的. (b) lacking spiritual purity; unchaste （精神上）不纯的, 不纯洁的: ,unclean `minds, `hearts, `thoughts 不纯洁的头脑、 心灵、 思想.
uncoil
/ 9Qn5kRIl; Qn`kRIl/ v [I, Tn] (cause sth/oneself to) become straightened from a coiled position; unwind （使某物[自己]）由卷绕状而伸直, 展开: The snake uncoiled(itself). 那蛇伸开了盘著的身体. * uncoil electric flex, a hose-pipe 展开盘著的电线、 水龙带.
uncoloured (US uncolored) 
/ 9Qn5kQlEd; Qn`kQlLd/ adj ~ (by sth) (fig 比喻) not affected or influenced by sth 不受影响的: an uncoloured description of events 对事件的客观描述 * His judgement was uncoloured by personal prejudice. 他的判断并不带有个人成见.
uncomfortable
/ Qn5kQmftEbl; ?@ -fErt-; Qn`kQmfLtEbl/adj  1 not comfortable 不舒服的; 不舒适的: uncomfortablechairs, shoes, rooms 不舒适的椅子、 鞋、 房间 * lie in an uncomfortable position 以一种不舒服的姿势躺著.  2 feeling or causing anxiety or unease 感到或引起不安的;不自在的: Children make some people feel uncomfortable.孩子常使一些人感到不舒服. * The letter was an uncomfortable reminder of my debts. 那封信是催促还债的通知, 让我很不痛快.
uncomfortably 
/ -EblI; -EblI/ adv  1 not comfortably不舒服地; 难受地: uncomfortably cramped 挤得难受.  2 in a way that causes disquiet or unease 使人不安地或不自在地: The exams are getting uncomfortably close. 快考试了, 真让人心神不安.
uncommitted
/ 9QnkE5mItId; 9QnkE`mItId/ adj ~ (to sth/sb) not bound or pledged to (a particular policy, course of action, group, etc) 不受（某政策、 做法、 团体等）的约束的; 未做承诺的: Some workers remain uncommitted to the project. 有些工人仍未对该计画做出承诺. * parties appealing to uncommitted voters 向无党派人士拉选票的政党. Cf 参看 committed (commit).
uncommon
/ Qn5kCmEn; Qn`kBmEn/ adj  1 not common; unusual 不普通的; 不寻常的: an uncommon sight, occurrence, etc 不平常的景象、 事情等 * Hurricanes are uncommon in England. 飓风在英国非常罕见.  2 (fml 文) remarkably close; excessive 非常接近的; 极度的: There was an uncommon likeness between the two boys. 这两个男孩儿长得像极了.
uncommonly 
adv (fml 文) remarkably 显著地; 极其: uncommonly intelligent, stupid, difficult 极其聪明、 愚蠢、 困难.
uncompromising
/ Qn5kCmprEmaIzIN; Qn`kBmprE9maIzIN/ adj not ready to make any compromise; firm or unyielding 不妥协的; 坚定的; 不让步的: an uncompromising negotiator, attitude, position 不妥协的谈判者、 态度、 立场 * attack the government's uncompromising stand on education cuts 抨击政府在削减教育经费问题上的僵硬态度. 
uncompromisingly 
adv.
unconcern
/ 9QnkEn5s\:n; 9QnkEn`s[n/ n [U] lack of care or interest 不关心; 不感兴趣; 冷漠: She heard the news of his death with apparent unconcern. 她听到他的死讯无动於衷.
unconcerned
/ 9QnkEn5s\:nd; 9QnkEn`s[nd/ adj  1 ~(with sth/sb) not feeling or showing concern; uninterested不关心的; 不感兴趣的; 冷漠的: unconcerned with questions of religion or morality 对宗教问题或道德问题不感兴趣.  2 ~ (at/by sth) free from anxiety; untroubled 无忧虑的; 不烦恼的: Most tourists were unconcerned at the poor weather. 那些游客大多没把坏天气放在心上. 
unconcernedly 
/ 9QnkEn5s\:nIdlI;9QnkEn`s[nIdlI/ adv.
unconditional
/ 9QnkEn5dIFEnl; 9QnkEn`dIFEnl/ adj not subject to conditions; absolute 无条件的; 绝对的: an,unconditional sur`render, re`fusal, `offer 无条件投降、 毫无商量余地的拒绝、 无保留的提供.
unconditionally
/ -FEnElI; -FEnElI/ adv.
unconditioned
/ 9QnkEn5dIFnd; 9QnkEn`dIFEnd/ adj (espof a reflex) not learned; instinctive （尤指反射）无条件的, 先天的. Cf 参看 conditioned reflex (condition2).
unconfirmed
/ 9QnkEn5f\:md; 9QnkEn`f[md/ adj (of facts,etc) not proved to be true; not confirmed （指事实等）未经证实的, 未予确认的: ,unconfirmed re`ports, `rumours, etc of a coup 有关政变的未经证实的报道、 谣传等.
unconscionable
/ Qn5kCnFEnEbl; Qn`kBnFEnEbl/ adj [attrib 作定语] (fml or joc 文或谑) unreasonable or excessive 昧著良心的; 不合理的; 过分的: You take an unconscionable time getting dressed! 你穿衣服用的时间未免太长了! 
unconscionably 
/ -EblI; -EblI/ adv: an unconscionably shy young man  过于腼腆的年轻男子.
unconscious
/ Qn5kCnFEs; Qn`kBnFEs/ adj  1 (a) not conscious; insensible 失去知觉的: knock sb unconscious 把某人打得不省人事. (b) ~ of sb/sth not aware 不知道的; 未察觉的: be unconscious of any change 未察觉出任何变化.  2 done or spoken, etc without conscious intention 无意地做出或说出的: an unconscious slight 无意的冒犯 * unconscious humour, resentment 无形中产生的幽默、 怨恨.
the unconscious 
n (psychology 心) that part of one's mental activity of which one is unaware, but which can be detected and understood through the skilled analysis of dreams, behaviour, etc 潜意识. Cf 参看 subconscious.
unconsciously 
adv: He unconsciously imitated his father. 他在不知不觉中仿效他的父亲.
unconsciousness 
n [U]  1 being unconscious; lack ofconsciousness; insensibility 无知觉; 无意识: lapse, fall, etc into unconsciousness 昏了过去.  2 lack of awareness of what one is doing, saying, etc 神志不清; 不知不觉.
unconsidered
/ 9QnkEn5sIdEd; 9QnkEn`sIdLd/ adj  1 (of words, remarks, etc) spoken or made without proper consideration or thought （指词语、 话语等）未经充分思考的, 脱口而出的.  2 disregarded, as if of little value or worth 不值得考虑的; 被忽视的.
uncooperative
/ 9QnkEU5CpErEtIv; 9Qnko`BpE9rEtIv/ adj not willing to co-operate with others 不愿合作的; 不愿配合的: uncooperative witnesses, patients, pupils, etc 不愿配合的证人、 病人、 学生等.
uncouple
/ 9Qn5kQpl; Qn`kQpl/ v [Tn, Tn.pr] ~ sth (from sth) disconnect (railway carriages, etc) 使（列车车厢等）脱钩或分离.
uncouth
/ Qn5ku:W; Qn`kuW/ adj (of people, their appearance, behaviour, etc) rough, awkward or ill-mannered; not refined （指人、 人的外表、 行为等）粗野的, 笨拙的, 无礼貌的, 无教养的.
uncouthness 
n [U].
uncover
/ Qn5kQvE(r); Qn`kQvL/ v [Tn]  1 remove a cover or covering from (sth) 移去（某物）的覆盖物; 揭开（某物）的盖子.  2 (fig 比喻) make known or disclose (sth); discover 揭露或暴露（某事物）; 发现: Agents have uncovered a plot against the President. 特工人员发现了一个反对总统的阴谋.
uncritical
/ 9Qn5krItIkl; Qn`krItIkl/ adj ~ (of sth/sb) (esp derog 尤作贬义) unwilling or unable to criticize 不愿批评的; 无批评能力的: an uncritical attitude, view, etc 不愿批评的态度、 观点等 * uncritical supporters of the government 不加批评而支持政府的人 * The review is uncritical of the violence in the film. 这篇评论对影片宣扬暴力方面未作批判. 
uncritically 
/ -IklI; -IklI/ adv.
uncrossed
/ 9Qn5krCst; ?@ -5krR:st; Qn`krRst/ adj (Brit) (of a cheque) not crossed (cross2 4) （指支票）未划线的.
uncrowned
/ 9Qn5kraUnd; Qn`kraJnd/ adj  1 (of a king, etc) not yet crowned （指国王等）尚未加冕的.  2 (idm 习语) the ,uncrowned `king/`queen (of sth) person considered to be the most talented or successful in a certain group or field 某类人或某领域中最有才华或成就的人: the uncrowned king of chess players/chess/the chessboard 国际象棋棋王.
UNCTAD
/ 5QNktAd; `QN9ktAd/ abbr 缩写 = United Nations Conference on Trade and Development 联合国贸易和发展会议.
unction
/ 5QNkFn; `QNkFEn/ n [U]  1 action of anointing with oil as a religious rite （作为宗教仪式的）涂油, 傅油礼.  2 (fml derog 文, 贬) = unctuousness.
unctuous
/ 5QNktjUEs; `QNktFJEs/ adj (derog 贬) insincerelyearnest or flattering, esp in an oily way 虚情假意的, 谄媚的（尤指油腔滑调的）: speak in unctuous tones 油腔滑调地说 * unctuous assurances 虚情假意的承诺. 
unctuously 
adv. 
unctuousness (also unction) 
n [U].
uncurl
/ 9Qn5k\:l; Qn`k[l/ v [I, Tn] ~ (sth/oneself) (cause sth/oneself to) become straightened from a curled position （使某物[自己]）由弯变直, 伸直: The cat uncurled (itself) sensuously. 那猫舒舒服服地伸了个懒腰. * She uncurled her legs from under her. 她把盘著的腿伸直了.
uncut
/ 9Qn5kQt; Qn`kQt/ adj  1 (of a book) with the outer folds of the pages not trimmed or cut open （指书）书页未切齐或未切开的, 毛边的.  2 (of a book, film, etc) not abridged or censored （指书、 影片等）未删节的, 未删改的: ,uncut `versions, e`ditions, `showings 全译本、 全版本、 全片放映.  3 (of a gem) not shaped by cutting （指宝石）未雕琢的.
undaunted
/ 9Qn5dR:ntId; Qn`dRntId/ adj [usu pred 通常作表语] (rhet 修辞) not discouraged or intimidated; fearless 顽强; 不惧怕; 无畏: He continued the climb, undaunted by his fall. 他跌下来也并未气馁, 继续攀登.
undeceive
/ 9QndI5si:v; 9QndI`siv/ v [Tn] (fml 文) free (sb) from an illusion or a deception 使（某人）不再抱幻想或不再受骗; 使（某人）醒悟: His behaviour soon undeceived her as to his true intentions. 他的行为很快就使她明白了他的真实意图.
undecided
/ 9QndI5saIdId; 9QndI`saIdId/ adj [pred 作表语]  1 not settled or certain 未解决; 未确定: The issue/matter remains undecided. 这个问题仍然悬而未决. * The (outcome of the) match is still undecided. 比赛（的结果）尚未见分晓.  2 ~ (about sth/sb) not having made up one's mind; irresolute 尚未拿定主意; 犹豫不定: I'm still undecided (about) who to vote for. 我尚未决定投谁的票.
undeclared
/ 9QndI5kleEd; 9QndI`klZrd/ adj (of goods liable to duty) not declared or shown to the Customs officers （指应纳税的货物）未向海关申报的, 未报关的.
undemonstrative
/ 9QndI5mCnstrEtIv; 9QndI`mBnstrEtIv/ adj not in the habit of showing strong feelings; reserved 不习惯表露强烈感情的; 喜怒不形於色的.
undeniable
/ 9QndI5naIEbl; 9QndI`naIEbl/ adj that cannot be disputed or denied; undoubtedly true 无可争辩的; 不可否认的; 确定无疑的: undeniable facts 无可否认的事实 * gems of undeniable worth/value 确实值钱的宝石 * His charm is undeniable, but I still mistrust him. 他有魅力无庸置疑, 但我仍对他没有信心. 
undeniably
/-EblI; -EblI/ adv: undeniably difficult 确实困难 * Undeniably,the final stage is crucial. 的确, 最後阶段是关键.
under
/ 5QndE(r); `QndL/ prep  1 in, to or through a position directly below (sth) 在（某物）下面; 到（某物）下面; 通过（某物）下面: The cat was under the table. 那猫在桌子下面. * Have you looked under the bed? 你看过床底下了吗? * Let's shelter under the trees. 咱们在树下避一避吧. * He threw himself under a bus. 他扑到一辆公共汽车底下去了. * The water flows under the bridge. 水在桥下流过. * (fig 比喻) What sign of the Zodiac were you born under? 你是属什麽星座的? Cf 参看 over2 1, 2.  2 below the surface of (sth); covered by 低於（某物）的 表面; 被（某物）遮蔽著: Most of the iceberg is under the water. 冰山的大部分在水面以下. * Under the mountain there is a network of caves. 这座山里有许多相通的洞穴. * She crept in beside him under the bedclothes. 她钻进被窝, 躺在他身旁. * She pushed all her hair under a headscarf. 她把头发都让头巾罩住.  3 in or to a position next to and lower than (sth) 在（某物）下方; 到（某物）下方: under the castle wall 在城墙下 * a village under the hill 山脚下的村庄.  4 (a) younger than (a specified age) 比（某年龄）小; 在（某年龄）以下: Many children under 5 go to nursery school. 5岁以下的许多儿童都上幼儿园. * It's forbidden to sell tobacco to children under 16. 禁止向16岁以下的儿童出售烟草. * If you are under 26 you can buy cheap rail tickets. 未满26岁者可购买廉价火车票. (b) less than (a specified amount, distance or time) 少於（某一数目、 距离或时间）: Anyone with an annual income of under 5000 may be eligible to apply. 凡年收入在5000英镑以下者均可申请. * It's under a mile from here to the post office. 此处距邮局不足一英里. * It tookus under an hour. 我们用了不到一个小时. Cf 参看 over2 5.5 (a) lower in rank than (sb); responsible to the authority of 级别低於（某人）; 隶属於...; 听命於...: No one under the rank of captain may enter the room. 级别低於上尉者禁止入内. * She has a staff of 19 working under her. 她手下有19名工作人员. (b) governed or led by (sb) 在（某人）统治或领导下: Britain under Cromwell, Thatcher, the monarchy 在克伦威尔、 撒切尔、 君主制治下的英国 * Under its new conductor, the errorism Act. 根据防止恐怖活动法案, 拘留了六名疑犯. * Under the terms of the lease you had no right to sublet the property. 根据租约规定, 你无权转租物业.  6 carrying (a specified burden) 承受（某种负荷）: She was struggling under the weight of three suitcases. 她提著三个箱子, 步履维艰. * (fml 文) It was difficult to behave naturally under the burden of knowing the truth. 了解了真相, 在此压力下自难行之若素.  7 (a) being in a state of (sth) 在（某事物）的状况中: buildings under repair/construction, ie being repaired/built 在修缮[建造]中的建筑物 * matters under consideration, discussion,etc 正在考虑、 讨论等中的问题. (b) being affected by (sb/sth) 在（某人[某事物]）影响下: He's very much under the influence of the older boys. 那些比他大的男孩对他影响很大. * You'll be under (an) anaesthetic, so you won't feel a thing. 给你施麻醉後, 你就什麽也感觉不到了.  8 (a) using (a particular name) 使用（某名称）: open a bank account under a false name 用假名字在银行开户 * write a novel under the pseudonym of Colin Kettle 用笔名科林·凯特尔写小说. (b) classified as (sth) 被分类为（某事物）: If it's not under sport, try looking under biography. 要是在运动类中查不到, 可以查查传记类.  9 being planted with (sth) 种植著（某物）: fields under wheat 种著小麦的田地.
under 
adv  1 under water 在水下: If you take a deep breath you can stay under for more than a minute. 只要深吸一口气就能在水里待上一分多钟. * The ship went under (ie sank) on its first voyage. 那条船在首次航行时就沉没了.  2 without consciousness 无知觉; 失去知觉: She felt herself going under. 她感到渐渐失去了知觉.
under 
adj [attrib 作定语] lower; situated underneath 较低的; 在下面的: the under layers 下层 * under surface 底面.
under-
pref 前缀  1 (with ns 与名词结合) (a) below 在...下面; 在...之下: undergrowth * undercurrent. (b) lower in rank; subordinate 级别低於; 隶属於: under-secretary * undergraduate.  2 (with adjs, vs and their related forms 与形容词、 动词及其相关形式结合) notenough 不足: underripe * underestimate * underdeveloped.Cf 参看 sub-.
under-secretary
/ 9QndE5sekrEtrI; ?@ -terI; 9QndL`sZkrE9tZrI/ n  1 person who is directly subordinate to a government official who has the title of `secretary' 副大臣; 副部长; 次长; 副国务卿.  2 (Brit) senior civil servant in charge of a government department 次官（政府部长的副职）: be Parliamentary under-secretary to the Treasury 当财政部政务次官.
under-sexed
/ 9QndE5sekst; 9QndL`sZkst/ adj having less sexual desire or potency than normal 性欲不强的; 性功能低下的. Cf 参看 over-sexed.
under-side
/ 5QndEsaId; `QndL9saId/ n [sing] side or surface that is underneath; bottom 下侧; 下部表面; 底面; 底部: His shot hit the under-side of the bar, ie the one across the goal-posts. 他射门击中了横梁的下侧.
underachieve
/ 9QndErE5tFi:v; 9QndErE`tFiv/ v [I] (euph 婉) do less well than was expected, esp in school work 成绩未如理想（尤指功课）. 
underachiever 
n.
underact
/ 9QndEr5Akt; 9QndL`Akt/ v [I, Tn] act (a part) with less spirit, force, etc than expected 表演（角色）不够尽心、 尽力等: He underacted the title-role to considerableeffect. 他演剧名角色演得很不带劲. Cf 参看 overact.
underarm
/ 5QndErB:m; `QndL9Brm/  1 adj [attrib 作定语] in, of or for the armpit 腋下的; 为腋下的: underarm hair, perspiration, deodorant 腋毛、 腋下出的汗、 腋下除臭剂.  2 adj, adv (also underhand) (in cricket, etc) with the hand kept below the level of the shoulder （板球等）低手式地（投球时手低於肩）: underarm bowling 低手投球 * bowl, serve, throw, etc underarm 低手投. Cf 参看 overarm.
underbelly
/ 5QndEbelI; `QndL9bZlI/ n [sing]  1 undersurface of an animal's body, eg as a cut of meat, esp pork（动物的）下腹部（如切下的一块, 尤指猪肉）.  2 (fig 比喻) area, region, etc that is vulnerable to attack 易受攻击的部位、 区域等: The stock-market crisis struck at the soft underbelly of the US economy, eg its trade deficit. 股市危机打击了美国经济的薄弱环节（如贸易逆差）.
underbid
/ 9QndE5bId; 9QndL`bId/ v (-dd-; pt, pp underbid)  1 [Tn] make a lower bid than (sb else), eg at an auction 出价低於（他人）（如拍卖时）.  2 [I, Tn] (in bridge, etc) bid less on (a hand of cards) than its strength suggests （桥牌等中）叫牌低於（手中牌）的实力. Cf 参看 overbid.
underbrush
/ 5QndEbrQF; `QndL9brQF/ n [U] (US) = undergrowth.
undercarriage
/ 5QndEkArIdV; `QndL9kArIdV/ (also `landing-gear) n aircraft's landing wheels and theirsupports （飞行器的）起落架: raise/lower the undercarriage 收起[放下]起落架. =>illus at aircraft 见 aircraft 插图.
undercharge
/ 9QndE5tFB:dV; `QndL`tFBrdV/ v [I, Ipr, Tn, Tn.pr, Dn.n] ~ (sb) (for sth) charge (sb) too low a price (for sth) 向（某人）少收（某物的）价款: He undercharged me 1 for the book/for the book by 1. 我买这本书他少收了我一英镑. Cf 参看 overcharge 1.
underclothes
/ 5QndEklEUTz; `QndL9kloTz/ n [pl] (also fml 文雅语作  underclothing / -klEUTIN; -kloTIN/ [U])= underwear.
undercoat
/ 5QndEkEUt; `QndL9kot/ n  1 [U, C] (paint used for making a) layer of paint under a finishing coat 底层（涂料）. Cf 参看 topcoat (top1).  2 [U] (US) = underseal.
undercover
/ 9QndE5kQvE(r); 9QndL`kQvL/ adj [esp attrib尤作定语]  1 doing things secretly or done secretly; surreptitious 暗中进行的; 秘密做出的; 私下的: ,undercover`payments, eg bribes 暗中付的款（如贿赂）.  2 engaged in spying on people while appearing to work normallyamong them 做密探工作的: ,undercover `agents, activities ,organizations 密探、 秘密活动、 进行秘密活动的组织 * detectives working undercover 掩人耳目行事的侦探.
undercurrent
/ 5QndEkQrEnt; `QndL9kQrEnt/ n  1 currentof water flowing below the surface or below another current 潜流; 暗流: strong, fierce, fast, dangerous, etc undercurrents 强劲的、 激烈的、 湍急的、 危险的...潜流.  2 ~ (of sth) (fig 比喻) underlying feeling or influence or trend, esp one opposite to the apparent one潜在的感情、 影响或倾向（尤指与其表象相反的）: Therewas an undercurrent of resentment in their acceptance of the plan. 他们接受该计画时心怀不满.
undercut
/ 5QndEkQt; `QndL9kQt/ n [U] (Brit) (meat cut from the) underside of sirloin （牛的）腰部肉, 里脊. Cf 参看 tenderloin (tender1).
undercut
/ 9QndE5kQt; 9QndL`kQt/ v (-tt-; pt, pp undercut) [Tn] offer goods or services at a lower price than (one's competitors) 以低於（竞争者）的价码出售货物或提供服务: They're undercutting us by 20p a packet. 他们以每小包比我们的便宜20便士的价格跟我们抢生意.
underdeveloped
/ 9QndEdI5velEpt; 9QndLdI`vZlEpt/ adj  1 not fully grown or developed 未充分发育或发展的: underdeveloped muscles 不发达的肌肉.  2 (of a country, etc) not having achieved its potential in economic development （指国家等）经济不发达的.
underdog
/ 5QndEdCg; ?@ -dR:g; `QndL9dR^/ n (esp 尤作 the underdog) person or country, thought to be in a weaker position, and therefore unlikely to win a contest, struggle, etc 处於劣势的人或国家（不易在竞争、 斗争等中获胜的）: crowds supporting the underdog 为处於劣势的一方鼓劲的人群.
underdone
/ 9QndE5dQn; `QndL`dQn/ adj not thoroughly done, esp lightly or insufficiently cooked 未充分做好的; （尤指烹饪）未熟透的: nicely underdone vegetables 半生不熟恰到好处的蔬菜 * The beef was underdone and quite uneatable. 这牛肉未熟透, 简直不能吃.
underestimate
/ 9QndEr5estImeIt; `QndL`ZstE9met/ v [Tn] make too low an estimate of (sb/sth) 过分低估（某人[某事物]）: underestimate the cost, danger, difficulty, etc of the expedition 对此次考察的费用、 危险、 困难等估计不足 * I underestimated the time we needed by 30%. 我把我们需要的时间低估了30%. * Never underestimate your opponent, ie think that you will beat him easily. 千万不要低估对手. Cf 参看 overestimate, underrate.
underestimate 
/ -mEt; -mIt/ n estimate that is too low 低估: a serious underestimate of losses on the Stock Exchange 对在证券交易所中遭到的损失严重估计不足. Cf 参看 overestimate.
underexpose
/ 9QndErIk5spEUz; `QndErIk`spoz/ v [Tn esp passive 尤用於被动语态] expose (a film, etc) for too short a time or in too poor a light 使（底片等）曝光不足. Cf 参看 overexpose. 
underexposure
/ -Ik5spEUVE(r); -Ik`spoVL/ n [U].
underfed
/ 9QndE5fed; `QndL`fZd/ adj having had toolittle food 喂食太少的; 没吃饱的: underfed cattle, troops,children 没吃饱的牛、 部队、 儿童.
underfelt
/ 5QndEfelt; `QndL9fZlt/ n [U, C] felt for laying under a carpet 地毯垫毡. Cf 参看 underlay.
underfloor
/ 9QndE5flR:(r); 9QndL`flRr/ adj [attrib 作定语] situated beneath the floor 在地板下的: ,underfloor (e,lectric) `wiring 在地板下的电线线路 * ,underfloor `heating, eg using warm air 在地板下的供热系统.
underfoot
/ 9QndE5fUt; 9QndL`fJt/ adv under one's feet; on the ground 在脚下; 在地上: The snow underfoot wassoft and deep. 脚下的雪又软又厚. * It's muddy underfoot.地上很泥泞. * Fallen riders were trampled underfoot by the charging horses. 摔下来的骑手遭飞奔马群践踏.
undergarment
/ 5QndEgB:mEnt; `QndL9^BrmEnt/ n (datedor fml 旧或文) article of underclothing 内衣.
undergo
/ 9QndE5gEU; 9QndL`^o/ v (pt underwent /- 5went; -`wZnt/, pp undergone / -5gCn; ?@ -5gR:n; -`^Rn/) [Tn]  1 experience or endure (sth unpleasant or painful) 经历, 经受（不愉快的或痛苦的某事物）: undergo great hardship, suffering, privation, etc 遭受极度的艰难、 困苦、 贫困等.  2 be subjected to (a process, etc) 接受, 承受（某过程等）: undergo major surgery, reform, repair 接受大手术、 经过大改革、 接受大检修 * The ship successfully underwent sea trials in coastal waters. 那条船在近海水域试航成功. * Our agenda underwent a rapid change after the chairman's resignation. 主席辞职後, 我们的议事项目迅即做出变动.
undergraduate
/ 9QndE5grAdVUEt; 9QndL`^rAdVJIt/ n university or college student who has not yet taken his first or bachelor's degree （尚未获学士学位的）大学生; 大学肄业生: Cambridge undergraduates 剑桥大学学生 * [attrib 作定语] undergraduate courses, grants, students 大学学士学位课程、 给予大学生的助学金、 大学生. Cf 参看 graduate1, postgraduate.
underground
/ 9QndE5graUnd; 9QndL`^raJnd/ adv  1 under the surface of the ground 在地面下; 在地下.  2 (fig 比喻) in or into secrecy or hiding 秘密地; 暗中地: He went underground to avoid the police. 他藏了起来以免被警方发现.
underground
/ 5QndEgraUnd; `QndL`^raJnd/ adj [attrib作定语]  1 under the surface of the ground 在地面下的; 地下的: underground passages, caves, etc 地下通道、 洞穴等 * an underground car-park 地下停车场.  2 (fig 比喻) secret, esp of an illegal political organization 秘密的; （尤指）非法政治组织的: the underground resistance movement, ie of the French opposing the German occupation of France during World War II 地下抵抗运动（第二次世界大战期间法国反对德国占领的运动） * the underground press 地下刊物.
underground 
n the underground  1 [sing] (alsoBrit infml 英式口语作 the tube, US subway) undergroundrailway 地下铁路; 地铁: travel by underground 乘坐地铁 * fares on the London Underground 伦敦地铁的车费 * [attrib 作定语] underground stations 地铁车站.  2 [CGp] secret (esp political) organization or activity 秘密的（尤指政治的）组织或活动: work for, join, contact the underground 为地下组织工作、 参加地下组织、 与地下组织取得联系.
undergrowth
/ 5QndEgrEUW; `QndL9^roW/ (US underbrush)n [U] mass of shrubs, bushes, etc growing closely on the ground, esp under trees 灌木丛（尤指大树下的）: clear a path through the undergrowth 从灌木丛中开辟一条小路.
underhand
/ 9QndE5hAnd; `QndL`hAnd/  1 adj (also underhanded / 9QndE5hAndId; 9QndL`hAndId/) done or doing things in a sly or secret way; deceitful 暗中或秘密进行的; 诡诈的: ,underhand `tricks, `methods, `means 骗人的花招、 方法、 手段.  2 adj, adv = underarm 2.
underlay
/ 5QndEleI; `QndL9le/ n [U, C] layer of felt, foam, rubber, etc laid (esp under a carpet) for support and insulation （毛毡、 泡沫塑料、 橡胶等做的）衬垫; （尤指）地毯垫. Cf 参看 underfelt.
underlie
/ 9QndE5laI; 9QndL`laI/ v (pt underlay / 9QndE5leI;9QndL`le/, pp underlain / -5leIn; -`len/)  1 [I, Tn] lie or exist beneath (sth) 位於或存在於（某物）之下: the underlying clay, rock, etc 处於下层的黏土、 岩石等.  2 [Tn no passive 不用於被动语态] (fig 比喻) form the basis of (sb's actions, a theory, etc); account for 构成（某人行动、 理论等）的基础; 作（某事物）的说明或解释: A deep faith underlies her work among refugees. 她在难民中工作是因为她有很深的信念. * the underlying reason for her refusal 她拒绝的内在原因.
underline
/ 9QndE5laIn; 9QndL`laIn/ (also underscore) v [Tn]  1 draw a line under (a word, etc) 在（词等）下面画线.  2 (fig 比喻) reinforce (an attitude, a situation, etc); emphasize 强化（态度、 形势等）; 加强; 强调: Strikes by prison officers underline the need for reform in our gaols. 监狱工作人员罢工一事, 突出地表明我们的监狱制度亟须改革.
underling
/ 5QndElIN; `QndLlIN/ n (derog 贬) person in a subordinate and inferior position 职位低的人; 下属: hired underlings of a gangster boss 流氓头子雇用的喽罗.
undermanned
/ 9QndE5mAnd; `QndL`mAnd/ adj (of a ship, factory, etc) having too few people to function properly （指轮船、 工厂等）人员不足的: complaints that our hospitals are seriously undermanned 对我们的一些医院严重缺员的投诉. Cf 参看 understaffed, overmanned.
undermentioned
/ 9QndE5menFnd; `QndL`mZnFEnd/ adj [usu attrib 通常作定语] (Brit fml 文) mentioned below or at a later place (in a letter, etc) 下面提到的; 下述的. 
the undermentioned 
n (pl unchanged 复数不变): The undermentioned is witness to this contract. 以下为本合同之见证人. Cf 参看 above-mentioned (above1).
undermine
/ 9QndE5maIn; 9QndL`maIn/ v [Tn]  1 make a hollow or tunnel beneath (sth); weaken at the base 在（某物）下挖洞或挖通道; 从根基处损害: Badgers had undermined the foundations of the church. 獾在这座教堂的地基处打了洞. * cliffs undermined by the sea 底部被海水毁坏了的峭壁.  2 (fig 比喻) weaken (sth/sb) gradually or insidiously 逐渐削弱或暗中破坏（某事物[某人]）: undermine sb's position, reputation, authority, etc, eg by spreading scandalous rumours 暗中损害某人的地位、 声誉、 威信等（如藉散播诽谤性的谣言） * self-confidence undermined by repeated failures 因屡遭挫折而逐渐削弱的自信心.
underneath
/ 9QndE5ni:W; 9QndL`niW/ prep beneath (sth); below 在（某物）的底下或下面: The coin rolled underneath the piano. 硬币滚到钢琴下面去了. * She found a lot of dust underneath the carpet. 她发觉地毯下面有许多尘土. * What does a Scotsman wear underneath his kilt? 苏格兰男子在短裙下面穿著什麽? * Caving means exploring the passages underneath the hills. 洞穴探险运动是指探察山中的通道而进行的活动.
underneath 
adv beneath; below 在底下; 在下面; 向下: There's a pile of newspapers in the corner  have you looked underneath? 角落里有一堆报纸--那底下你找过了吗? * When they cleaned up the painting they discovered a Holbein underneath. 他们擦这幅画时发现下面有一幅霍尔拜因的作品. * (fig 比喻) He seems bad-tempered but he's very soft-hearted underneath. 他似乎脾气很坏, 其实心底里很善良.
underneath 
n [sing] lower surface or part of sth 物体下部的面; 底面; 底部; 下部: the underneath of a car, shelf, sofa 汽车、 搁架、 长沙发的底部.
undernourished
/ 9QndE5nQrIFt; 9QndL`nQrIFt/ adj not provided with sufficient food of the right kind for good health and normal growth 营养不良的: badly, severely, seriously undernourished 严重缺乏营养. Cf 参看 malnourished. 
undernourishment 
/ -5nQrIFmEnt; -`nQrIFmEnt/ n [U].
underpants
/ 5QndEpAnts; `QndL9pAnts/ (also infml 口语作  pants) n [pl] short undergarment worn by men and boys covering the lower part of the body （男用）内裤, 衬裤: put on some/a pair of clean underpants 穿上一条乾净的内裤 * He stood there in his underpants, ie not wearing anything else. 他只穿著内裤站在那儿. Cf 参看 knickers.
underpass
/ 5QndEpB:s; ?@ -pAs; `QndL9pAs/ n (a) (section of a) road that goes under another road or a railway 高架桥下通道或路段（从另一条公路或铁路下方穿过的）. Cf 参看 overpass. (b) underground passage for pedestrians to cross below a road or railway 地下通道（供行人穿越道路或铁路的）. Cf 参看 subway 1.
underpay
/ 9QndE5peI; 9QndL`pe/ v (pt, pp underpaid /- 5peId; -`ped/) [Tn, Tn.pr] ~ sb (for sth) pay (an employee, etc) too little money 付给（雇员等）报酬过低: Nurses are overworked and underpaid. 护士的工作过重而报酬过低. * He underpaid me for the work (by 10). 我做这工作他少给了我（10英镑）工资. Cf 参看 overpay.
underpin
/ 9QndE5pIn; 9QndL`pIn/ v (-nn-) [Tn]  1 support (a wall, etc) from below with masonry, etc 用砖石结构等从下面支撑（墙等）; 加固（墙等）的基础.  2 (fig 比喻) form the basis for (an argument, a claim, etc); strengthen 为（论据、 主张等）打下基础; 加强; 巩固: The evidence underpinning his case was sound. 有利於他的证据是确凿的. * These developments are underpinned by solid progress in heavy industry. 重工业的稳固发展为这些进展打下了基础.
underplay
/ 9QndE5pleI; 9QndL`ple/ v [Tn] give too littleimportance to (sth) 对（某事物）不够重视: underplay certainaspects, factors, elements, etc 对某些方面、 因素、 成分等不够重视. Cf 参看 overplay.
underprivileged
/ 9QndE5prIvElIdVd; `QndL`prIvElIdVd/ adj (euph 婉) not having the standard of living or rights enjoyed by others in a society; deprived 生活水平或享有的权利比别人低的; 贫困的: socially underprivileged families, groups, etc 社会地位低下的家庭、 阶层等.
the underprivileged 
n [pl v]: The underprivileged need special support. 贫困者需要特殊的帮助.
underrate
/ 9QndE5reIt; 9QndL`ret/ v [Tn] have toolow an opinion of (sb/sth) 对（某人[某事物]）评价过低: underrate an opponent, achievement 对对手、 成就评价过低 * an underrated play, actor 受到贬抑的戏剧、 演员 * As an actor, he's seriously underrated. 他这个演员受到的评价过低. Cf 参看 overrate, underestimate.
underscore
/ 9QndE5skR:(r); 9QndL`skRr/ v [Tn] = underline.
undersea
/ 5QndEsi:; `QndL9si/ adj [attrib 作定语] belowthe surface of the sea 海面下的: undersea exploration 海下探测.
underseal
/ 5QndEsi:l; `QndL9sil/ (Brit) (US undercoat) n [U] tar-like or rubber-like substance used to protect the under-side of a motor vehicle against rust, etc （机动车底部的）防蚀涂层.
underseal 
v [Tn] coat the under-side of (a motor vehicle, etc) with a protective seal 用防蚀涂层涂（机动车等）的底部.
undersell
/ 9QndE5sel; 9QndL`sZl/ v (-ll-; pt, pp undersold /- 5sEUld; -`sold/) [Tn] sell (goods) at a lower price than (one's competitors) 以低於（竞争者）的价格出售（货物）: Our goods cannot be undersold, ie Our prices are the lowest. 本公司货物价格别家无法竞争（我们的价格最低）. * They're underselling us. 他们正在压价与我们竞争.
undershirt
/ 5QndEF\:t; `QndL9F[t/ n (US) = vest1 1.
undersigned
/ 9QndE5saInd; 9QndL`saInd/ adj (fml 文) who has or have signed at the bottom of a document 在文件下端签字的. 
the undersigned 
n (pl unchanged复数不变): We, the undersigned (ie We whose signatures appear below), declare that... 我们, 本文件之签署人声名如下....
undersized
/ 9QndE5saIzd; `QndL`saIzd/ adj (usu derog 通常作贬义) of less than the usual size 较一般为小的:,undersized `portions, `helpings, ie of food 小份的（食物） * The cubs were sickly and undersized. 那些幼兽又弱又矮小.
underslung
/ 9QndE5slQN; 9QndL`slQN/ adj  1 supported from above 下悬式的.  2 (of a vehicle chassis) hanging lower than the axles （指机动车底盘）下置车架的.
undersold
pt, pp of undersell.
understaffed
/ 9QndE5stB:ft; ?@ -5stAft; 9QndL`stAft/ adj (of a school, a hospital, an office, etc) having too few people to function properly （指学校、 医院、 办公室等）人员不足的: The school is badly understaffed.这所学校教职员工严重不足. Cf 参看 overstaffed, undermanned.
understand
/ 9QndE5stAnd; 9QndL`stAnd/ v (pt, ppunderstood / -5stUd; -`stJd/) (not used in the continuoustenses 不用於进行时态)  1 (a) [I, Tn, Tw] grasp the meaning of (words, a language, a person, etc) 懂、 理解或领会（语词、 语言、 某人等）的意思: I'm not sure that I fully understand (you). 我不敢说我已完全听懂了（你的话）. * understand the instructions, rules, conditions, etc 了解指示、 规则、 情况等 * I can understand French perfectly. 法语我完全懂. * I don't understand (a word of) what you're saying, eg because you're speaking too quickly. 你的话我（一个字也）听不懂（因为你说得太快）. (b) [Tn, Tw, Tsg] perceive the significance or importance of (sth); perceive the explanation for or cause of 了解（某事物）的意义或重要性; 认识到...的道理或原因: Do you understand the difficulty of my position? 你了解我处境的困难吗? * I don't understand why he came/what the problem is. 我不明白他为什麽来[这是什麽问题]. * I just can't understand him/his taking the money. 我真无法理解他[他为什麽要偷钱].  2 [I, Tn, Tf, Tw, Tsg] be sympathetically aware of (sb/sth); know how to deal with (sb/sth) 了解, 理解, 谅解, 同情（某人[某事物]）; 善於与（某人[某事物）打交道: understand children, machinery, modern music 了解儿童、 机器的性能、 现代音乐 * We thoroughly understand each other/one another, even if we don't always agree. 我们彼此非常了解, 虽然有时候也有一些分歧. * I quite understand that you need a change/your needing a change. 你需要换换环境, 这一点我完全理解. * He understands how hard things have been for you. 他很同情你的艰难处境.  3 (usu fml 通常作文雅语) (a) [Tf, Cn.t] be aware from information received (that...); gather 得知; 获悉; 推断: I understand she is in Paris. 我听说她现在巴黎. * Am I to understand that you refuse? 看意思你是拒绝了? * The situation, as I understand it, is very dangerous. 情况据我看十分危险. * I understood him to say/as saying that he would co-operate. 我认为他愿意合作. (b) [Tf usu passive 通常用於被动语态] take (sth) for granted 认为（某事物）当然如此: Your expenses will be paid, that's understood. 你的费用给你�
understandable 
/ -Ebl; -Ebl/ adj that can beunderstood or sympathized with 能懂的; 可理解的; 可同情的: The instructions were not readily/easily understandable. 这份说明书不容易懂. * understandable delays, objections ,motives 可以理解的延误、 异议、 动机.
understandably
/-EblI; -EblI/ adv: She was understandably annoyed. 她很生气, 这是可理解的.
understanding
/ 9QndE5stAndIN; 9QndL`stAndIN/ n  1 [U] power of clear thought; intelligence 理解力; 洞察力; 智力; 智慧: mysteries beyond human understanding 人类无法理解的奥秘.  2 [U, sing] ~ (of sth) knowledge of the meaning, importance or cause (of sth) 对（某事物的）意思、 重要性或原因的了解: I have only a limited understanding of French. 我懂的法语很有限.  3[U, sing] ability to show insight or tolerance; sympatheticawareness 体谅; 谅解; 通情达理: no real understanding between husband and wife 夫妻之间没有真正的相互体谅 * our improved understanding of Soviet life 我们对过去的苏联人的生活的进一步了解 * work for a better understanding between world religions 为促进世界上各宗教之间的互相谅解而努力.  4 (a) [U] ~ (of sth) (usu fml 通常作文雅语) interpretation of information received 对信息的解释或理解: My understanding was that we would meet here. 根据我的理解, 我们将在这儿见面. (b) [C usu sing 通常作单数] preliminary or informal agreement （初步的或非正式的）协议, 协定, 谅解: come to/reach an understanding with management about pay 与资方就工资问题达成协议 * We have an understanding that/There is an understanding between us that we will not sell to each other's customers. 我们双方有个默契, 就是不把货物卖给对方的顾客.  5 (idm 习语)on the understanding that...; on this understandingon condition that...; on this condition 在...条件下; 以此为条件: I lent him 5 on the understanding that he would repay me today. 我借给他5英镑, 条件是他今天得还给我.
understanding 
adj able to show tolerance of or sympathy towards others' feelings and views 体谅的; 谅解的; 通情达理的: an understanding approach, smile, parent 体谅的态度、 微笑、 父亲（或母亲）.
understate
/ 9QndE5steIt; 9QndL`stet/ v [Tn]  1 state or express (sth) in a very controlled way 很有节制地陈述或表达（某事物）: understate one's views, feelings, reactions,etc 轻描淡写地表达自己的观点、 感情、 反应等 * She gave a beautifully understated performance as Ophelia. 她扮演奥菲利亚这一角色用低调处理, 恰如其分.  2 state that (a number, etc) is less than it really is 少说, 少报（某数目等）: understate one's losses, eg of money, troops 少报损失（如金钱、 兵员的损失）.
understatement 
/ 5QndEsteItmEnt; `QndL9stetmEnt/ n (a) [U] (action or practice of) understating 有节制的陈述或表达; 少说; 少报: a clever use of understatement, eg for effect 巧妙地轻描淡写（如为获得某种效果）. (b) [C] statement that expresses an idea, etc too weakly 重事轻说; 轻描淡写: To say that he was displeased is an understatement, ie He was furious. 说他不高兴是重事轻说（他已怒不可遏）.
understudy
/ 5QndEstQdI; `QndL9stQdI/ n ~ (to sb) person who learns the part of another in a play, etc in order to be able to take his place at short notice if necessary 候补演员; 替手: (fig 比喻) The Vice-President acts as understudy to the President. 副总统是总统的替手.
understudy 
v (pt, pp -died) [Tn] learn (eg a part in a play) as understudy; act as understudy to (sb) 排练（如剧中角色）充当候补演员; 当（某人）的替手: understudy (the role of) Ophelia 排练奥菲利亚（一角）当候补演员 * She understudied Judi Dench. 她充当朱迪.登奇的替手.
undertake
/ 9QndE5teIk; 9QndL`tek/ v (pt undertook /- 5tUk; -`tJk/, pp undertaken / -5teIkEn; -`tekEn/) (fml 文)  1 [Tn] (start to) make oneself responsible for (sth) 承担（某事物）; 负起（某事物）的责任: undertake a mission, task, project, etc 承担使命、 任务、 工程项目等 * She undertook the organization of the whole scheme. 她负责整个计画的组织工作.  2 [Tf, Tt] agree or promise to do sth 同意或答应做某事: He undertook to finish the job by Friday. 他答应在星期五以前完成那工作.
undertaking 
/ 9QndE5teIkIN; 9QndL`tekIN/ n  1 [sing] work, etc that one has undertaken; task or enterprise 任务; 事业; 企业: a commercial, financial, etc undertaking商业、 金融等企业 * Small businesses are a risky undertaking.小型企业要担很大的风险. * Getting married is a serious undertaking. 结婚是件大事.  2 ~ (that.../to do sth) (fml 文) promise or guarantee 答应; 许诺; 保证; 担保: an undertaking that the loan would be repaid 一项偿还贷款的担保 * She gave a solemn undertaking to respect their decision. 她郑重地保证尊重他们的决定.
undertaker
/ 5QndEteIkE(r); `QndL9tekL/ (US also mortician) n person whose business is to prepare the dead for burial or cremation and arrange funerals 殡仪业人员.
undertaking 
/ 5QndEteIkIN; `QndL9tekIN/ n [U] business of an undertaker 殡仪业.
undertone
/ 5QndEtEUn; `QndL9ton/ n  1 (often pl 常作复数) low, quiet or subdued tone 低调; 低声; 低音: speak, murmur, etc in an undertone 低声说话、 低语 * threatening, sympathetic, sibilant undertones 威胁的、 同情的、 嘶嘶的低声调.  2 ~ (of sth) underlying feeling, quality, implication, etc; undercurrent 潜在的感情、 特质、 意义等; 暗流: There were undertones of relief as the visitors left. 客人走後大家都暗暗松了口气. Cf 参看 overtone.  3 thin or subdued colour 淡色; 浅色; 柔和的色调: pink with an undertone of mauve 略带淡紫色的粉红.
undertow
/ 5QndEtEU; `QndL9to/ n [sing] current below the surface of the sea, moving in the opposite direction to the surface current, esp the current caused by the backward flow of a wave breaking on a beach （海面下与海面水流呈反向流动的）回流（尤指浪拍岸退回形成的）: caught in an undertow 碰上回流 * The pull of the undertow can drag swimmers out to sea. 近岸回流的冲力能把游泳的人涌到海里.
undervalue
/ 9QndE5vAlju:; `QndL`vAlju/ v [Tn, Cn.n/a] ~ sb/sth (as sth) put too low a value on sb/sth 对某人[某事物]评价过低; 低估某人[某事物]: We had undervalued the flat by 5000. 我们对这套公寓的估价少了5000英镑. * Don't undervalue Jim's contribution to the research. 不要低估了吉姆在研究工作中的贡献. * We clearly undervalued him as a member of our team. 我们显然低估了他这个队员在我们队中的作用.
underwater
/ 9QndE5wR:tE(r); `QndL9wRtL/ adj situated or used or done below the surface of the water 水面下的; 水下使用的; 水下行动的: ,underwater `caves, `cameras水下洞穴、 摄影机 * underwater archaeology, eg ofwrecks 水下考古学（如有关失事船的）.
underwater
adv: The duck disappeared underwater. 鸭子潜入水中了.
underwear
/ 5QndEweE(r); `QndL9wZr/ n [U] (also underclothes [pl], fml 文雅语作 underclothing [U]) clothes worn under a shirt, dress, etc next to the skin 内衣物: thermal underwear 保暖内衣 * She packed one change of underwear, eg a bra, pants, tights. 她打点好一套替换的内衣物（如乳罩、 内裤、 裤袜）.
underweight
/ 9QndE5weIt; `QndL`wet/ adj below the usual, legal or stated weight 低於一般重量的; 未达标准或规定之重量的; 重量不足的: You are only slightly underweight for (ie in relation to) your height. 按你的身高来说, 你体重仅稍轻一点儿. * The coal is six pounds underweight/underweight by six pounds. 这些煤的重量少了六磅. =>Usage at thin 用法见thin. Cf 参看 overweight.
underwent
/ 9QndE5went; 9QndL`wZnt/ pt of undergo.
underworld
/ 5QndEw\:ld; `QndL9w[ld/ n the underworld [sing]  1 (in mythology) place under the earth inhabited by the departed spirits of the dead （神话中的）阴间, 阴曹.  2 part of society that lives by vice and crime 下流社会; 黑社会: police contacts in the London underworld伦敦黑社会中的警方眼线 * [attrib 作定语] leading underworld figures, ie notorious criminals 黑社会的头面人物（劣迹昭彰的罪犯）.
underwrite
/ 9QndE5raIt; 9QndL`raIt/ v (pt underwrote /- 5rEUt; -`rot/, pp underwritten / -5rItn; -`rItn/) [Tn]  1 sign and accept liability under (an insurance policy, esp for ships), thus guaranteeing payment in the event of loss or damage 在（保险单, 尤指船舶保险单）下方签署并承担责任（承保损失或损坏之责）.  2 (finance 财) undertake to buy, at an agreed price, all stock in (a company) that is not bought by the public （按商定的价格）认购（某公司）的全部剩余证券; 包销（证券）: The shares were underwritten by the Bank of England. 这些股票由英格兰银行包销.  3 undertake to finance (an enterprise) 同意资助（某事业）: The government underwrotethe initial costs of the operation. 政府为该项活动提供了开办时所需的费用.
underwriter 
n person or organization that underwrites insurance policies, esp for ships 保险业者, 保险公司（尤指船只的）: an underwriter at Lloyd's 劳埃德保险社承保人.
undeserved
/ 9QndI5z\:vd; 9QndI`z[vd/ adj not fair or just不恰当的; 不应得的: an undeserved punishment, rebuke, reward 不该受的惩罚、 责备、 报偿 * His reputation as a Romeo is quite undeserved. 他有罗密欧之称是名不副实的. 
undeservedly 
/ -dI5z\:vIdlI; -dI`z[vIdlI/ adv.
undesirable
/ 9QndI5zaIErEbl; 9QndI`zaIrEbl/ adj  1 likely to cause trouble or inconvenience; unwanted 可能招致麻烦或不便的; 不想要的: The drug has no undesirable side-effects. 这种药没有什麽不良的副作用. * Military intervention is highly undesirable. 军事干涉极不相宜.2 (of a person, his habits, etc) of a kind not to be welcomed in society; objectionable （指人、 人的习惯等）不受大家欢迎的, 令人不快的, 讨厌的: She's a most undesirable influence. 她是个专门不起好作用的人.
undesirable 
n undesirable person 不受欢迎的人; 讨厌的人: drunks, vagrants and other undesirables 醉鬼、 无业游民等讨厌的人 * (joc 谑) The club hires a bouncer to keep out undesirables. 这个俱乐部雇用了一个保镳来驱逐捣乱分子.
undesirably 
/ -EblI; -EblI/ adv.
undeterred
/ 9QndI5t\:d; 9QndI`t[d/ adj not deterred or discouraged 未被吓住的; 不气馁的: undeterred by failure 不因失败而气馁 * It was raining heavily but he set out undeterred. 雨下得很大, 他仍不顾一切出发了.
undeveloped
/ 9QndI5velEpt; 9QndI`vZlEpt/ adj  1 not fully grown or developed 未充分发育的; 未发展的; 不发达的: undeveloped fruit, muscles, organs 未成熟的水果、 不发达的肌肉、 发育不良的器官.  2 not yet used for agriculture, industry, building, etc 尚未用於农业、 工业、 建筑业等的; 未开发的: undeveloped land 未开发的土地 * undeveloped resources, sites 未开发的资源、 地点.
undid
/ Qn5dId; Qn`dId/ pt of undo.
undies
/ 5QndIz; `QndIz/ n [pl] (infml 口) (esp women's) underclothes （尤指女用的）内衣: She appeared in her undies. 她穿著内衣出来了.
undignified
/ Qn5dIgnIfaId; Qn`dI^nE9faId/ adj not showing proper dignity; clumsy 不庄重的; 不像样子的: an undignified retreat, collapse, failure, etc 不光彩的退却、 倒台、 失败等 * His skis crossed and he sat down in a most undignified manner. 他的滑雪板交叉在一起坐下时, 姿势很不雅观.
undischarged
/ 9QndIs5tFB:dVd; 9QndIs`tFBrdVd/ adj (finance 财)  1 (of a debt) not paid （指债务）未偿清的.  2 (esp of a bankrupt person or firm) still legally obliged to pay money owing to creditors （尤指破产的个人或公司）仍须清偿债务的. Cf 参看 discharge.
undisputed
/ 9QndI5spju:tId; 9QndI`spjutId/ adj  1 that cannot be doubted or questioned 无可置疑的; 毫无疑问的: undisputed facts, talents, rights 无可怀疑的事实、 才干、 权利.  2 accepted without dispute; unchallenged 无可争辩的; 无异议的: the undisputed champion, winner, etc 无可争辩的冠军、 优胜者等 * the undisputed market leader 在市场上无与匹敌的产品（或公司）.
undistinguished
/ 9QndI5stINgwIFt; 9QndI`stIN^wIFt/ adj lacking any outstanding feature; mediocre or poor 无特徵的; 无特色的; 普普通通的; 平庸的: an undistinguishedcareer, appearance 平淡无奇的事业、 外表 * be undistinguished as a diplomat 当个平庸的外交官.
undivided
/ 9QndI5vaIdId; 9QndE`vaIdId/ adj (idm 习语) give one's undivided attention (to sth/sb); get/have sb's undivided attention concentrate fully (on sth/sb); be the one thing or person that sb attends to 全神贯注（於某事物[某人]）; 为某人关注的对象: You have my (full and) undivided attention. 你是我一心（一意）注意的人. * Tom seldom got his mother's undivided attention. 汤姆很少受到母亲全心的关怀.
undo
/ Qn5du:; Qn`du/ v (pt undid / Qn5dId; Qn`dId/, pp undone / Qn5dQn; Qn`dQn/) [Tn]  1 untie or unfasten (knots, buttons, etc); open (a parcel, an envelope, etc) 解开, 松开（结、 钮扣等）; 打开, 拆开（包裹、 信封等）: My zip has come undone. 我的拉锁开了. * I can't undo my shoelaces. 我解不开鞋带. * undo (ie unravel) some knitting 拆开编结物. Cf 参看 do up (do2), do sth up.  2 destroy the effect of (sth); cancel 使（某事物）无效;取消; 废除: He undid most of the good work of his predecessor. 他把前任的大部分业绩毁掉了. * What is done cannot be undone. 已做的事是既成事实.
undoing 
/ Qn5du:IN; Qn`duIN/ n [sing] (fml 文) cause of sb's ruin or downfall 造成某人毁灭或垮台的原因: Drink was his undoing. 他酗酒是堕落的根源. * lead, contribute to sb's undoing 导致、 促使某人毁灭.
undone 
adj [pred 作表语]  1 untied, unfastened oropened 已解开; 已松开; 已拆开; 已打开: Your buttons areall undone. 你的钮扣全解开了.  2 not done; unfinished 未做的; 未完成的: The work was left/remained undone. 工作还没做完.
undoubted
/ Qn5daUtId; Qn`daJtId/ adj [attrib 作定语] not doubted or questioned; indisputable 无疑的; 肯定的; 毋庸置疑的: her undoubted skill, class, ability, etc as an athlete 她身为运动员的无可置疑技术、 水平、 能力等 * an undoubted improvement in my health 我的身体确实的好转 * an undoubted authority on the subject 这学科毫无疑义的权威. 
undoubtedly 
adv: The paintingis undoubtedly genuine. 这幅画无疑是真品. * undoubtedly so 确实如此.
undreamed-of
/ Qn5dri:md Cv; Qn`drimdBv/ (also undreamt-of / Qn5dremt Cv; Qn`drZmtBv/) adj not thought to be possible; not (even) imagined 梦想不到的; 难以想像的: undreamed-of wealth, success 意想不到的财富、 成功 * We now travel round the world in a way previously undreamt-of. 我们现今能周游世界, 以前简直做梦也想不到.
undress
/ 9Qn5dres; Qn`drZs/ v  1 [I] take off one's clothes 脱去衣物: undress and get into bed 脱掉衣服上床睡觉.  2 [Tn] remove the clothes of (sb/sth) 脱去（某人[某物]）的衣物: undress a child, doll 脱掉孩子、 玩具娃娃的衣服.
undressed 
adj [usu pred 通常作表语] with one's clothes off; naked 已脱掉衣物; 裸露: Are you undressed yet? 你已经脱了衣服了吗? * It's time the children got undressed. 孩子都该脱衣服了.
undrinkable
/ 9Qn5drINkEbl; Qn`drINkEbl/ adj not fit to be drunk, because of impurity or poor quality （因有杂质或质量低劣而）不能喝的, 不宜饮用的: This wine is quite undrinkable. 这种酒根本不能喝.
undue
/ 9Qn5dju:; ?@ -5du:; Qn`du/ adj [attrib 作定语] (fml 文) more than is right or proper; excessive 不当的; 过分的; 过度的: with ,undue `haste 过於仓促 * show undue concern over sb/sth 对某人[某事物]表现过分关心 * apply undue pressure to make sb change his mind 施加不适当的压力迫使某人改变想法.
undulate
/ 5QndjUleIt; ?@ -dVU-; `QndVE9let/ v [I] have a wave-like movement or appearance 波动; 起伏; 呈波浪形: (a field of) wheat undulating in the breeze 在微风中起伏的（一片）麦浪 * undulating hills, fields, etc 起伏的山冈、 田野等.
undulation 
/ 9QndjU5leIFn; ?@ -dVU-; 9QndVE`leFEn/ n (a) [U] wave-like movement or appearance 波动; 起伏. (b) [C] one of a number of wave-like curves or slopes 波状的弯曲或斜坡: The downs fell in gentle undulations to the sea. 这块丘陵地略带倾斜伸向大海.
unduly
/ 9Qn5dju:lI; ?@ -5du:lI; Qn`dulI/ adv (fml 文) more than is right or proper; excessively 不当地; 过分地; 过度地: without being unduly pessimistic, suspicious, etc 并不过於悲观、 猜疑等 * not unduly influenced/not influenced unduly by the media 并未过分受传播媒介的影响.
undying
/ 9Qn5daIIN; Qn`daIIN/ adj [attrib 作定语] everlasting or never-ending 不死的; 不朽的; 永恒的: undying love, hatred, fame 永恒的爱、 永久的恨、 不朽的名声.
unearned
/ 9Qn5\:nd; Qn`[nd/ adj  1 not gained by working 非劳动所得的; 不劳而获的: ,unearned `income, eg from interest on investments 非劳动收入（如投资利润所得）.  2 not deserved 不应得的: ,unearned `praise 不该受到的赞扬.
unearth
/ Qn5\:W; Qn`[W/ v [Tn, Tn.pr] ~ sth (from sth)  1 uncover or obtain sth from the ground by digging 发掘或挖出某物: unearth buried treasure 发掘埋在地下的宝藏 * The dog has unearthed some bones.那条狗刨出了一些骨头.  2 (fig 比喻) find sth by searching; discover and make known 搜寻到某事物; 发现并披露: I unearthed the portrait from the attic. 我从阁楼上搜出这幅画像. * unearth new facts about Shakespeare发现有关莎士比亚的新资料.
unearthly
/ Qn5\:WlI; Qn`[WlI/ adj  1 supernatural or mysterious or frightening 超自然的; 神秘的; 可怕的: unearthly visions, screams 怪异的幻象、 尖叫声 * The silence was unearthly. 静得可怕.  2 [attrib 作定语] (infml 口) absurdly early or inconvenient 早得或不便得离谱的: Why should I get up at this unearthly hour? 为什麽我得这麽早起床? * the unearthly time of 2.30 am 凌晨两点三十分这麽个不方便的时间.
uneasy
/ Qn5i:zI; Qn`izI/ adj (-ier, -iest)  1 ~ (about/atsth) troubled or anxious 不安的; 忧虑的: have an uneasyconscience, ie feel guilty 良心不安（感到内疚） * I'm uneasy in my mind about the future. 我为前途担忧.  2 fitful or uncomfortable 一阵阵的; 不舒服的: an uneasy truce, silence 一阵一阵的休战、 沉默 * pass an uneasy night, ie sleep badly 一夜没睡好觉.  3 disturbing or worrying 令人不安的; 使人担忧的: They had an uneasy suspicion that all was not well. 他们十分不安, 怀疑并非一切顺利.
unease 
/ Qn5i:z; Qn`iz/, uneasiness ns [U] apprehension 忧虑; 担心: I waited with growing unease for her return. 我等著她回来, 心里越来越不安.
uneasily 
/ Qn5i:zIlI; Qn`izIlI/ adv: He moved uneasily in his chair. 他坐在椅子上动来动去十分不安.
uneatable
/ 9Qn5i:tEbl; Qn`itEbl/ adj (of food, etc) not fit to be eaten, esp because of its poor condition （指食物等）不适於食用的, 不能吃的（尤因处理不善或变质）. Cf 参看 inedible.
uneconomic
/ 9Qn9i:kE5nCmIk, 9Qn9ek-; 9Qn9ikE`nBmIk,9Qn9Zk-/ adj not likely to be profitable; not economic不大可能赢利的; 不经济的: ,uneconomic `factories, `industries, `businesses, etc 不太可能赚钱的工厂、 工业、 企业等 * the closure of uneconomic pits, ie coal-mines 不赢利煤矿之关闭.
uneconomical
/ 9Qn9i:kE5nCmIkl, 9Qn9ek-; 9Qn9ikE`nBmIkEl, 9Qn9Zk-/ adj wasteful or inefficient; not thrifty 浪费的; 效率低的; 不节约的: an uneconomical method of housekeeping 缺乏精打细算的持家方法. 
uneconomically 
/ -klI; -klI/ adv.
uneducated
/ Qn5edVUkeItId; Qn`ZdVJ9ketId/ adj  1suggesting lack of the type of education, social backgroundor good manners considered desirable 未受良好教育的; 缺乏教养的: uneducated speech, handwriting 缺乏修养的言语、 书法 * uneducated tastes 庸俗的趣味.  2 having received little or no formal education at a school, etc 未受过正规教育的; 没上过学的; 文盲的.
unemployed
/ 9QnIm5plRId; 9QnIm`plRId/ adj  1 temporarilywithout a paid job 未被雇用的; 失业的.  2 not in use 不在使用中的; 未用的: (finance 财) unemployed capital, ie capital that is not invested 游资（未用於投资的资金）.
the unemployed 
n [pl v] people who are (temporarily) without work 失业的人.
unemployment
/ 9QnIm5plRImEnt; 9QnIm`plRImEnt/ n [U] (a) state of being unemployed 失业; 失业状况: 300 workers face unemployment 300名工人面临失业 * throughout the period of your unemployment 在你失业的整个期间. (b) amount of unused labour 失业人数: reduce unemployment, eg by creating jobs 减少失业人数（如藉创造就业机会） * the rising level of unemployment 不断增长的失业率 * [attrib 作定语] the monthly unemployment figures 每月的失业人数.
unemployment benefit 
(US unemployment compensation) [U] money paid to a worker who cannot find employment 失业津贴; 失业救济金.
unending
/ Qn5endIN; Qn`ZndIN/ adj  1 everlasting orunceasing 无止境的; 不停的: the unending struggle betweengood and evil 善与恶之间永无休止的斗争.  2 (infml 口) frequently repeated 不断重复的: I'm tired of your unending complaints. 我厌倦了你那没完没了的牢骚.
unequal
/ 9Qn5i:kwEl; Qn`ikwEl/ adj  1 ~ (in sth) different (in size, amount, etc) （在大小、 数量等方面）不同的, 不相等的: The twins are unequal in height. 这一对孪生儿高矮不一样.  2 not at the same level of strength, ability, etc （力量、 能力等）不平等的, 不相称的: an unequal bargain, contest, struggle 不等价的交易、 不平等的竞争、 力量悬殊的斗争 * unequal pay and conditions, eg for women 不平等的工资和劳动条件（如对妇女的）.  3 [pred 作表语] ~ to sth (fml 文) not strong, clever, etc enough to do sth （对做某事）无力, 无才, 不胜任: I feel unequal to the task. 我觉得难以胜任这项工作. 
unequally 
/ -kwElI; -kwElI/ adv.
unequalled
/ 9Qn5i:kwEld; Qn`ikwEld/ adj superior to all others; unmatched 无比的; 无匹的; 无双的: His record as a show-jumper is unequalled. 他超越障碍赛马的记录无出其右. * The husky is unequalled for stamina and endurance. 爱斯基摩狗的体力和耐性是无双的.
unequivocal
/ 9QnI5kwIvEkl; 9QnI`kwIvEkl/ adj (fml文) having only one possible meaning; clear and unmistakeable 只有一种含义的; 清楚明白的: an unequivocal attitude, position, demand 明确的态度、 立场、 要求. 
unequivocally 
/ -kElI; -kElI/ adv: state one's intentions unequivocally 明确地说出自己的打算.
unerring
/ 9Qn5\:rIN; Qn`[IN/ adj not making mistakes or failing or missing the mark; consistently accurate 不犯错误的; 万无一失的; 一贯准确的: his unerring taste in clothes, instinct for a bargain, sense of direction 他那万无一失的衣物审美观点、 讨价还价的本能、 方向感 * He has an unerring knack of saying the wrong thing. 他有个出言必失的本事. * His aim was unerring. 他百发百中. 
unerringly 
adv.
UNESCO (also Unesco) 
/ ju:5neskEU; ju`nZsko/ abbr 缩写 = United Nations Educational, Scientific and Cultural Organization 联合国教育、 科学及文化组织.
unethical
/ 9Qn5eWIkl; Qn`ZWIkl/ adj without principles, esp in business or professional conduct 无原则的（尤指业务或职业道德方面）: unethical decisions, practices 无原则的决定、 做法. 
unethically 
/ -klI; -klI/ adv.
uneven
/ 9Qn5i:vn; Qn`ivEn/ adj  1 not level or smooth or regular 不平坦的; 不平滑的; 不规则的: an uneven hemline, ie of a skirt 凹凸的底边线（裙子的） * an uneven pavement, floor 高低不平的人行道、 地板.  2 not uniform or equal; varying 不一致的; 不相等的; 有差异的: have an uneven pulse, heartbeat 脉搏、 心律紊乱 * Emotion made his voice uneven. 他激动得声音都变了. * work of uneven quality 质量不稳定的工作.  3 (of a contest, match, etc) unequal （指竞争、 比赛等）不对等的, 不势均力敌的. 
unevenly 
adv. 
unevenness 
n [U].
unexceptionable
/ 9QnIk5sepFEnEbl; 9QnIk`sZpFEnEbl/adj (fml 文) that cannot be criticized; entirely satisfactory无可挑剔的; 无懈可击的: her unexceptionable behaviour, conduct, etc 她那无可指摘的行为、 品行等. 
unexceptionably 
/ -EblI; -EblI/ adv.
unexceptional
/ 9QnIk5sepFEnl; 9QnIk`sZpFEnEl/ adv not outstanding or unusual; quite ordinary 不突出的; 平常的; 普通的. 
unexceptionally 
/ -FEnElI; -FEnElI/ adv.
unexpected
/ 9QnIk5spektId; 9QnIk`spZktId/ adj causing surprise because not expected 未料到的; 意外的; 突如其来的: ,unexpected `guests, `questions, `gifts 不速之客、 突如其来的问题、 料想不到的礼物 * ,unexpected de`velopments, `changes, re`sults 未料到的发展、 变化、 结果 * His reaction was quite unexpected. 他的反应完全出乎大家意料之外.
the unexpected 
n [sing] event, etc that is unexpected 意外的事情: be prepared for the unexpected (to happen) 为意外情况（之发生）做好准备.
unexpectedly 
adv.
unexpectedness 
n [U].
unfailing
/ Qn5feIlIN; Qn`felIN/ adj (approv 褒)  1 never coming to an end; constant 永恒的; 无穷的: an unfailing source of inspiration 用之不竭的灵感的源泉 * their unfailing efforts for peace 他们为争取和平的不懈努力 * his unfailing patience, good humour, devotion, etc 他那始终如一的耐性、 好脾气、 奉献精神等.  2 [usu attrib 通常作定语] that can be relied on; certain 可靠的; 确实的: her unfailing cooperation, support, etc 她给予的可靠的合作、 支持等.
unfailingly 
adv at all times 永远; 始终; 一贯: unfailingly courteous 一贯谦恭有礼.
unfair
/ 9Qn5feE(r); Qn`fZr/ adj  1 ~ (on/to sb) not rightor just 不公正的; 不公平的: ,unfair `treatment, compe`tition不公平的待遇、 竞争 * an ,unfair de`cision, com`parison, ad`vantage 不公允的裁决、 比较、 有利地位 * If some athletes use drugs, it is unfair on/to the others. 有的运动员若使用兴奋剂, 其他运动员就要吃亏. * She sued her employer for unfair dismissal. 她控告雇主无理解雇工人.  2 not following normal rules or principles 违反规则或准则的: ,unfair `tactics 不正当的手段 * ,unfair `play, eg at a football match 犯规动作（如足球比赛中的） * (commerce 商) ,unfair `trading 违例交易. 
unfairly 
adv. 
unfairness 
n [U].
unfaithful
/ 9Qn5feIWfl; Qn`feWfEl/ adj ~ (to sb/sth)  1 having committed adultery 有通奸行为的; 不忠的: Her husband is unfaithful (to her). 她丈夫（对她）不忠.  2 (dated 旧) not loyal; treacherous 不忠实的; 背叛的; 变节的: an unfaithful servant, subject, etc 不忠实的仆人、臣民等. 
unfaithfully 
/ -fElI; -fElI/ adv. 
unfaithfulness
n [U].
unfamiliar
/ 9QnfE5mIlIE(r); 9QnfE`mIljL/ adj  1 ~ (to sb) not well known 不熟悉的: His face was unfamiliar to me. 我觉得他很面生. * working in new and unfamiliar surroundings 在不熟悉的新环境中工作.  2 [pred 作表语] ~ with sth (fml 文) not having knowledge of sth; not acquainted with sth 对某事物不了解或不熟悉: I'm unfamiliar with this type of computer. 我不熟悉这种类型的计算机. 
unfamiliarity 
/ 9QnfE9mIlI5rEtI; 9QnfE9mIlI`ArEtI/ n [U].
unfathomable
/ Qn5fATEmEbl; Qn`fATEmEbl/ adj (fml 文)  1 so deep that the bottom cannot be reached 深得无法到达底部的: the ocean's unfathomable depths 海洋中无法到达的深处.  2 (fig 比喻) too strange or difficultto be understood 莫测高深的; 难以了解的: unfathomable motives, mysteries 难以理解的动机、 奥秘.
unfeeling
/ Qn5fi:lIN; Qn`filIN/ adj hard-hearted or unsympathetic 无情的; 硬心肠的; 无同情心的: unfeeling behaviour 无情的行为 * an unfeeling person, remark, attitude, reaction 无同情心的人、 言语、 态度、 反应. 
unfeelingly 
adv.
unfeigned
/ Qn5feInd; Qn`fend/ adj not pretended; genuine or sincere 不虚伪的; 真正的; 真诚的: greet sb with unfeigned pleasure, delight, sympathy, etc 真正高兴地、 喜悦地、 同情地...招呼某人. 
unfeignedly
/,QnfeInIdlI; Qn`fenIdlI/ adv.
unfit
/ 9Qn5fIt; Qn`fIt/ adj  1 ~ (for sth/to do sth) (a) not of the required standard; unsuitable 不合格的; 不适宜的: food unfit for human consumption 人不能吃的食物 * houses unfit for people to live in 不适合居住的房屋. (b) lacking the ability needed; incapable 不胜任的; 无能力的: She is unfit for such a senior position. 她不胜任这种高级职务. * He is unfit to drive in his present state, eg because he is drunk. 他现在这样不能开车（如因喝醉了酒）.  2 not perfectly healthy and fit 不太健康的; 不太健壮的: The army rejected him as medically unfit. 他因体检不合格而未能入伍.
unflagging
/ 9Qn5flAgIN; Qn`flA^IN/ adj not showing signs of tiredness; untiring 毫无倦容的; 不疲倦的: unflagging energy, zeal, devotion, etc 充沛的精力、 不衰的热情、 不懈的奉献精神 * listen with unflagging attention, interest, concentration, etc 全神贯注地、 兴趣昂然地、 聚精会神地...听著. 
unflaggingly 
adv.
unflappable
/ 9Qn5flApEbl; Qn`flApEbl/ adj (infml 口 esp Brit) remaining calm in a crisis; imperturbable 临危不乱的; 镇定自若的: A busy manager needs a completely unflappable secretary. 经理工作忙就需要一个头脑十分冷静的秘书. 
unflappability 
/ 9QnflpE5bIlEtI; Qn9flApE`bIlEtI/ n [U].
unflinching
/ Qn5flIntFIN; Qn`flIntFIN/ adj not showing fear or shrinking in the face of danger, difficulty, etc 临危不惧的; 知难而上的: unflinching courage, determination,resoluteness, etc 临危不惧的勇气、 知难而上的决心、 百折不挠的毅力. 
unflinchingly 
adv: He held out his hand unflinchingly for the cane. 他毫不畏缩地伸出手去挨藤条打.
unfold
/ Qn5fEUld; Qn`fold/ v  1 [I, Tn] (cause sth to) open or spread out from a folded state （使某物）展开, 打开: The garden chair unfolds to make a camp-bed. 花园中这把椅子可以打开当行军床用. * unfold a map, tablecloth, etc 展开地图、 桌布等 * The eagle unfolded its wings. 那鹰伸展开了翅膀.  2 [I, Tn, Dn.pr] ~ sth (to sb) (fig 比喻) (cause sth to) be revealed or made known （使某事物）显露, 展现: The landscape unfolded before us. 那景色展现在我们面前. * as the story, scene, enquiry unfolds (itself) 如故事、 场景、 调查所显示的那样 * She unfolded her plans to me. 她向我透露了她的计画.
unforeseen
/ 9QnfR:5si:n; 9QnfRr`sin/ adj not known inadvance; unexpected 未预见到的; 意料之外的: ,unforeseen`circumstances, de`velopments, `difficulties 未预见到的情况、 发展、 困难.
unforgettable
/ 9QnfE5getEbl; 9QnfL`^ZtEbl/ adj (espapprov 尤作褒义) that cannot be easily forgotten; memorable难忘的; 永远记得的: an unforgettable experience, moment,scene 难忘的经历、 瞬间、 场面.
unformed
/ 9Qn5fR:md; Qn`fRrmd/ adj not (yet) having developed fully; immature （尚）未充分发展的; 未成熟的: her ,unformed `handwriting 她那没有功底的书法 * The child's character is as yet unformed. 那孩子的性格尚未定型.
unfortunate
/ Qn5fR:tFEnIt; Qn`fRrtFEnIt/ adj  1 havingor causing bad luck; unlucky 不幸的; 倒霉的: I was unfortunate enough to lose my keys. 我把钥匙丢了, 真倒霉. * an unfortunate expedition 运气不佳的探险 * an unfortunate start to our holiday 我们度假之出行不利.  2 unsuitable or regrettable 不合适的; 不恰当的; 令人遗憾的; 可惜的: an unfortunate remark, coincidence, mishap 不得体的话、 令人遗憾的巧合、 可悲的事故 * a most unfortunate choice of words 极不恰当的措辞 * It is unfortunate that you missed the meeting. 真可惜, 你没参加那次会议.
unfortunate 
n (esp pl 尤作复数) unfortunate or wretched person 不幸的人; 可怜人: Unlike many other poor unfortunates, I do have a job. 我同许多不幸的人不一样, 我是有工作的.
unfortunately 
adv ~ (for sb) regrettably; unluckily遗憾地; 不幸地: The notice is most unfortunately phrased.这份通知用语很不得当. * I can't come, unfortunately.很遗憾, 我来不了. * Unfortunately for him, he was wrong.很遗憾, 他错了.
unfounded
/ 9Qn5faUndId; Qn`faJndId/ adj with no basis in fact; groundless 无事实根据的; 无基础的: unfounded rumours, suspicions, hopes 毫无根据的谣言、 无端的猜疑、 虚幻的希望.
unfreeze
/ 9Qn5fri:z; Qn`friz/ v (pt unfroze / -5frEUz; -`froz/, pp unfrozen / -5frEUzn; -`frozEn/)  1 [I, Tn] (cause sth to) thaw （使某物）解冻: unfreeze some chops 把一些冻排骨化开. Cf 参看 defrost.  2 [Tn] (finance 财) remove official controls on (the economy, etc) 解除对（经济等）的控制; 放开（经济等）: unfreeze wages, prices, etc 解除对工资、 价格等的冻结 * unfreeze trade restrictions 取消贸易限制.
unfriendly
/ 9Qn5frendlI; Qn`frZndlI/ adj (-ier, -iest) ~ (to/towards sb) hostile or unsympathetic 不友好的; 有敌意的; 冷漠的: an unfriendly look, gesture, attitude 不友好的神情、 姿态、 态度 * He was distinctly unfriendly towards me. 他对我很冷淡.
unfrock
/ 9Qn5frCk; Qn`frBk/ (also defrock) v [Tn esp passive 尤用於被动语态] dismiss (a priest guilty of bad conduct) from the priesthood 免去（行为不检的牧师）之圣职.
unfurl
/ 9Qn5f\:l; Qn`f[l/ v [I, Tn] unroll, unfold or spread out (sth) 展开, 张开, 铺开（某物）: unfurl a flag, banner, sail, etc 展开旗子、 旗帜、 风帆等.
ungainly
/ Qn5geInlI; Qn`^enlI/ adj clumsy or awkward; not graceful 笨拙的; 难看的; 不雅的: the ungainly movements of ducks out of water 鸭子出水的笨拙动作 * He walked in long ungainly strides. 他迈著笨拙的大步子行走. 
ungainliness 
n [U].
unget-at-able
/ 9Qnget5AtEbl; 9Qn^Zt`AtEbl/ adj (infml 口) (in a place that is) not easy to reach; inaccessible 难到达的; 在难到达之处的; 不易接近的.
ungodly
/ 9Qn5gCdlI; Qn`^BdlI/ adj  1 (dated or fml 旧或文) not giving reverence to God; sinful or wicked 不敬上帝的; 违反宗教或道德准则的; 邪恶的: lead an ungodly life 过著不道德的生活.  2 [attrib 作定语] (infml 口) very inconvenient 很不方便的: Why are you phoning at this ungodly hour (of the night)? 你为什麽在（夜里）这个时候打电话来?
ungovernable
/ 9Qn5gQvEnEbl; Qn`^QvLnEbl/ adj (fml 文) impossible or difficult to control; violent 无法或难以控制的; 剧烈的: fly into an ungovernable rage, temper,etc 勃然大怒、 大发雷霆 * a man of ungovernable passions难以控制感情的人.
ungracious
/ 9Qn5greIFEs; Qn`^reFEs/ adj grudging or resentful; impolite 勉强的; 忿恨的; 不礼貌的: her ungracious acceptance of my offer 她接受我的提议时那种勉强的态度 * It was ungracious of me not to acknowledge your help. 你大力帮助而我尚未表示谢意, 十分失礼. 
ungraciously 
adv.
ungrammatical
/ 9QngrE5mtIkl; 9Qn^rE`mAtIkl/ adj contrary to the rules of grammar 不符合语法的; 违反语法规则的: ungrammatical sentences, constructions, etc 不合乎语法的句子、 结构形式等. 
ungrammatically
/-klI; -klI/ adv.
ungrateful
/ Qn5greItfl; Qn`^retfEl/ adj ~ (to sb) (for sth)not recognizing a kindness, service, etc; not grateful 不感激的; 不领情的; 忘恩负义的: You ungrateful wretch! 你这忘恩负义的家伙! 
ungratefully 
/ -fElI; -fElI/ adv.
unguarded
/ 9Qn5gB:dId; Qn`^BrdId/ adj  1 not guarded 无防卫的; 无人守护的: The prisoner was left unguarded. 那犯人无人看守. * Never leave your luggage unguarded, ie unattended. 千万注意看好自己的行李.  2 (esp of a person and what he says) careless or indiscreet （尤指人及言语）粗心的, 不留神的, 不谨慎的: unguarded comments, criticisms, etc 轻率的评语、 批评等 * catch sb in an unguarded moment 乘某人不备将其抓住.
unhappy
/ Qn5hApI; Qn`hApI/ adj (-ier, -iest)  1 (a) sad or miserable; not happy 悲伤的; 难过的; 不幸福的; 不愉快的: look, sound, etc unhappy 看上去、 听起来...很不高兴 * an unhappy occasion, atmosphere, face 不愉快的场合、 气氛、 脸色. (b) ~ (about/at sth) anxious or dissatisfied 忧虑的; 发愁的; 不满意的: Investors were unhappy about the risk. 投资者为这一风险而担心.  2 unfortunate or unlucky; regrettable 不幸的; 不走运的; 令人遗憾的: an unhappy coincidence, chance, etc 不幸的巧合、 偶然事故等 * What has led to this unhappy state of affairs? 事情弄到这步田地是什麽原因造成的?  3 [usu attrib 通常作定语] (fml 文) not suitable or appropriate 不合适的; 不恰当的: an unhappy comment, decision, choice 不恰当的评语、 决定、 选择.
unhappily 
/ -IlI; -IlI/ adv  1 sadly 可悲地; 难过地.  2 unfortunately 不幸地; 不走运地; 遗憾地: Unhappily, she is not here today. 真遗憾, 她今天不在这儿.
unhappiness 
n [U].
unhealthy
/ Qn5helWI; Qn`hZlWI/ adj (-ier, -iest)  1 not having or not showing good health 不健康的: an unhealthy pallor, complexion, cough 不健康的苍白、 面容、 咳嗽声 * (fig 比喻) the unhealthy state of the economy 不景气的经济状况.  2 harmful to health 有害於健康的; 不卫生的: an unhealthy climate, diet, life-style 不利於健康的气候、 固定饮食、 生活方式 * living in damp unhealthy conditions 在有害於健康的潮湿环境中生活.  3 unwholesome or morbid 有害身心健康的; 病态的: show an unhealthy interest in/curiosity about murder 对凶杀案表现出病态的兴趣[好奇心].  4 (infml 口) dangerous to life 有生命危险的: Terrorist attacks made our position very unhealthy. 在恐怖分子的袭击下我们面临生命危险. 
unhealthily 
/ -IlI; -IlI/ adv. 
unhealthiness 
n [U].
unheard
/ 9Qn5h\:d; Qn`h[d/ adj [usu pred 通常作表语] having nobody willing to pay attention; unheeded 无人理会; 未引起注意: Her case was/went unheard by the authorities. 她的问题当局不予考虑.
unheard-of 
/ Qn5h\:d Cv; Qn`h[d9Bv/ adj not previously known of or done; unprecedented 前所未闻的; 无先例的; 空前的: Radiation reached unheard-of levels. 辐射作用已达到前所未有的程度. * It was unheard-of for anyone to complain. 从未听说过有人投诉的事.
unhinge
/ Qn5hIndV; Qn`hIndV/ v [Tn esp passive 尤用於被动语态] cause (sb) to become mentally unbalanced 使（某人）精神失常或错乱: The shock unhinged his mind. 他经这一打击精神失常了. * Unhinged by her death, he fell ill. 她死後他精神错乱而病倒了.
unholy
/ 9Qn5hEUlI; Qn`holI/ adj (-ier, -iest) [attrib 作定语]  1 wicked or sinful 亵渎神明的; 违反宗教或道德准则的; 邪恶的; 罪恶的: an unholy alliance between some Communists and Fascists 某些共产党分子和法西斯分子之间罪恶的联盟.  2 (infml 口) (used as an intensifier 用以加强语气) outrageous or excessive 令人不能容忍的; 极端的; 过分的: leave things in an unholy muddle/mess 把事情弄得乱七八糟 * making an unholy row/din/racket 吵得受不了.
unholiness 
n [U].
unhoped-for
/ Qn5hEUpt fR:(r); Qn`hopt9fRr/ adj not hopedfor or expected 未曾料到的; 意外的: an unhoped-for piece of good luck 出乎意料的好运.
uni-
comb form 构词成分 having or consisting of one 单; 一: unilateral * unisex.
UNICEF
/ 5ju:nIsef; `junIsZf/ abbr 缩写 = United Nations Children's (formerly International Children's Emergency) Fund 联合国儿童基金会.
unicellular
/ 9ju:nI5seljUlE(r); 9junI`sZljElL/ adj (biology 生) (of an organism) consisting of a single cell （指有机体）单细胞组成的.
unicorn
/ 5ju:nIkR:n; `junI9kRrn/ n mythical animal resemblinga horse with a single straight horn projecting from its forehead （神话中似马的）独角兽. =>illus at coat of arms (coat) 见coat of arms (coat)插图.
unidentified
/ 9QnaI5dentIfaId; 9QnaI`dZntI9faId/ adj that cannot be identified 不能辨认的; 无法识别的: an unidentified species, submarine, caller 辨别不出的种类、 潜艇、 来客 * information from unidentified sources 来源不明的信息.
unidentified flying object (abbr 缩写 UFO) 
= flying saucer (flying).
uniform
/ 5ju:nIfR:m; `junE9fRrm/ adj not changing in form or character; unvarying （形式或特徵）无变化的; 一律的: of uniform length, size, shape, colour, etc 长度、 大小、 形状、 颜色等一样的 * The rows of houses were uniform in appearance. 这一排排的房子外观相同. * be kept at a uniform temperature 保持恒温 * uniform distribution of weight 重量的均匀分布. > uniformity/ 9ju:nI5fR:mEtI; 9junE`fRrmEtI/ n (esp derog 尤作贬义) [U]: a depressing uniformity of taste 趣味方面使人感到沉闷的千篇一律. uniformly adv: Reaction to the cuts was uniformly negative. 对削减经费一事一律持反对态度.
uniform
/ 5ju:nIfR:m; `junE9fRrm/ n  1 [C, U] distinctive clothing worn by all members of an organization or group, eg the police, the armed forces, nurses 制服（如警察、 军人、 护士穿的）: children wearing school uniform(s)穿校服的儿童.  2 (idm 习语) in uniform (a) wearing such clothing 穿著制服: officers in full dress uniform 穿全套军装的军官. (b) belonging to the armed forces 属於军队: How long was he in uniform? 他在军队里服役多久了?
uniformed 
adj wearing uniform 穿著制服的: uniformed staff, eg at a hotel 穿著制服的工作人员（如旅馆服务员） * the uniformed branch of the police, ie as contrasted with detectives, who wear plain clothes 穿制服的警察（以别於便衣警察）.
unify
/ 5ju:nIfaI; `junE9faI/ v (pt, pp -fied) [Tn] form (sth) into a single unit or make uniform 使（某物）成为一体; 使统一; 使一致: Germany was unified in 1871. 德国於1871年统一了. * the unifying effect of the nurses' strike 护士罢工产生的团结效应 * England and Scotland do not have a unified legal system. 英格兰和苏格兰法制不统一.
unification 
/ 9ju:nIfI5keIFn; 9junEfE`keFEn/ n [U]: seeking the unification of Christian churches 谋求基督教教派的统一.
unilateral
/ 9ju:nI5lAtrEl; 9junI`lAtErEl/ adj [usu attrib 通常作定语] done by or affecting one person, group, country, etc and not another; one-sided 单方面做出的; 仅影响一方的; 单方面的; 单边的: unilateral decisions, agreements, declarations, etc 单方面的决定、 协议、 宣布等 * unilateral (nuclear) disarmament, ie voluntary removalor dismantling by a country of its (nuclear) weapons单方面（核）裁军. Cf 参看 bilateral, multilateral. 
unilaterally 
/ -rElI; -rElI/ adv.
unimpeachable
/ 9QnIm5pi:tFEbl; 9QnIm`pitFEbl/ adj (fmlapprov 文, 褒) that cannot be doubted or questioned; trustworthy 无可怀疑的; 无可指摘的; 可靠的: unimpeachable honesty, behaviour 无可怀疑的诚实、 行为 * evidence from an unimpeachable source 来源可靠的证据. 
unimpeachably 
/ -EblI; -EblI/ adv.
uninformed
/ 9QnIn5fR:md; 9QnIn`fRrmd/ adj  1 not having or showing sufficient information 信息不足的; 情况不明的: an uninformed estimate, opinion, criticism 情况不明的估计、 看法、 批评 * Her colleagues had deliberately kept her uninformed. 她那些同事故意不让她知道.  2 uneducated or ignorant 未受教育的; 无知的: the uninformed political discussion you hear in pubs 在酒馆里可听到的对於政治十分无知的谈论 * (fml or joc 文或谑) Quercus, or, to the uninformed layman, the oak... 栎属乔木, 亦即外行人所谓的橡树....
uninspired
/ 9QnIn5spaIEd; 9QnIn`spaIrd/ adj without imagination or inspiration; dull 无想像力的; 无灵感的; 枯燥的: an uninspired speech, performance, painting, etc 枯燥无味的讲话、 表演、 图画等.
uninspiring
/ 9QnIn5spaIErIN; 9QnIn`spaIrIN/ adj not producing interest or excitement; unpromising 引不起兴趣的; 无鼓舞作用的; 无指望的: The book is fascinating, despite its uninspiring title. 这本书很有意思, 虽然书名并不吸引人.
unintelligible
/ 9QnIn5telIdVEbl; 9QnIn`tZlIdVEbl/ adj impossible to understand 不可能理解的; 难懂的: unintelligible handwriting, jargon 看不懂的笔迹、 莫名其妙的行话 * speak in an almost unintelligible whisper 用几乎听不清的低声说话. 
unintelligibly 
/ -EblI; -EblI/ adv.
uninterested
/ Qn5IntrEstId; Qn`IntrIstId/ adj ~ (in sb/sth) having or showing no interest or concern; indifferent不感兴趣的; 不关心的; 淡漠的. =>Usage at interest2 用法见 interest2.
uninviting
/ 9QnIn5vaItIN; 9QnIn`vaItIN/ adv not attractive; repellent 不吸引人的; 令人反感的: an uninviting meal of cold fish and chips 凉鱼和炸土豆条这样一顿不起眼的饭食 * The hotel room was bare and uninviting. 这个旅馆房间光秃秃的, 很不好看.
union
/ 5ju:nIEn; `junjEn/ n  1 [U, sing] ~ (of A with B/between A and B) (act or instance of) uniting or being united 结合; 联合; 合并: the union of three towns into one 三个市镇之合而为一 * support the union between our two parties/the union of our party with yours 赞成我们两党的联合[我党同贵党的联合].  2 [C] (a) (esp political) whole formed by uniting parts, states, etc （尤指政治上的）联盟、 联邦等: the Union of Soviet Socialist Republics 苏维埃社会主义共和国联盟. (b) association or club formed by uniting people or groups 会社; 协会; 俱乐部: the National Union of Working Men's Clubs 全国劳工组织联合会 * members of the Students' Union, ie a general social and debating society at some universities and colleges 学生会成员（某些大专院校的） * join the Mothers' Union 加入母亲联合会. (c) = trade union (trade1).  3 (fml or joc 文或谑) (a) [U] state of being in agreement or harmony 一致; 和睦: live together in perfect union 十分和睦地在一起生活. (b) [C] instance of this, esp a marriage 一致, 和睦（尤指婚姻）: a happy union, blessed with six children 有六个子女的美满婚姻.  4 [C] coupling for rods or pipes （棒或管的）连接（器）.
unionize, unionise 
/ -aIz; -aIz/ v [I, Tn] organize (people) into a trade union 成立或组织工会: unionize afirm's employees 把公司的雇员组织成工会 * a unionizedwork-force 加入工会的职工总数.
unionization, unionisation
/ 9ju:nIEnaI5zeIFn; US -nI5z-; 9junjEnE`zeFEn/ n [U].
the Union Jack (also the Union flag) 
the national flag of the United Kingdom 联合王国国旗; 英国国旗.
unionist
/ 5ju:nIEnIst; `junjEnIst/ n (a) member of a trade union or supporter of trade unions 工会会员; 拥护工会的人. (b) Unionist person favouring political union, esp between Britain and Northern Ireland 拥护实行政治联合的人; （尤指）主张不列颠及北爱尔兰实行联合的人.
unionism 
/ 5ju:nIEnIzEm; `junjE9nIzEm/ n [U].
unique
/ ju:5ni:k; ju`nik/ adj  1 (a) being the only one of its type 独一无二的; 仅有的; 唯一的: a unique work of art 独一无二的艺术作品. (b) having no like or equal; unparalleled 独特的; 无比的; 无双的: a unique opportunity 难得的机会 * a unique ability 独有的能力.  2 [pred 作表语] ~ to sb/sth concerning or related to one person or group or thing only 仅与一个人或一个群体或一件事物有关: special difficulties unique to blind people 盲人遇到的特殊困难.  3 (infml 口) unusual; remarkable 不寻常的; 突出的: a rather unique little restaurant 别具一格的餐馆.
uniquely 
adv: She is uniquely suited to the job. 她是唯一适於做此工作的人. 
uniqueness 
n [U].
unisex
/ 5ju:nIseks; `junIsZks/ adj designed to be suitable for both sexes in style or function （式样或用途）不分性别的, 男女皆宜的: unisex fashions 男女通用的时装 * a unisex hairdressing salon 男女美发厅.
unison
/ 5ju:nIsn, 5ju:nIzn; `junEsn, `junEzn/ n (idm 习语) in unison (with sb/sth) (a) sounding or singing together the same musical note (or the same note in different octaves) （同音或八度同音的）齐奏, 齐唱: The last verse will be sung in unison. 歌词的最後部分要齐唱. (b) (fig fml 比喻, 文) acting together in close association or agreement 一致的或协调的行动: The banks have acted in unison with the building societies in lowering interest rates. 银行降低了利率来配合房屋建筑协会的行动.
unit
/ 5ju:nIt; `junIt/ n   1 individual thing, person or group regarded for purposes of calculation, etc as single and complete, or as part of a complex whole （作为计算单位等的单个的事物、 人或群体或构成复杂整体的）单位, 单元: the family as the unit of society 作为社会基本单位的家庭 * The course book has twenty units. 这个课本有二十个单元.  2 quantity chosen as a standard in terms of which other quantities may be expressed, or for which a stated charge is made （作为计量的）单位: The metre is a unit of length. 米是长度单位. * The monetary unit of Great Britain is the pound. 英国的货币单位是镑. * SI units 国际标准单位 * a bill for fifty units of electricity 一张用电五十度的帐单.  3 (esp in compounds 尤用以构成复合词) (a) part with a special function within a large or complex machine （机器的）部件, 元件, 构件: a `filter unit 过滤装置 * the central `processing unit in a computer 计算机的中央处理机. (b) group with a special function within a large or complex organization （组织的）单位: a unit of highly-trained soldiers 经过高度训练的士兵小分队 * a bomb-disposal unit 未爆炸弹处理小组.  4 piece of furniture, equipment, etc designed to fit with others that are similar or complementary （组合家具、 成套设备等的）组合件: matching kitchen units 配套的厨房设备 * storage units 存储设备.  5 (a) smallest whole number; the number 1  最小整数; 1: The number 34 consists of three tens and four units. 34这个数含有三个十和四个一. (b) any whole number from 0 to 9  从0到9的任何一个整数: a column for the tens and a column for the units 十位数列和个位数列.
unit price 
price charged for each single item of goods of the same type 单价.
unit trust (Brit) (US `mutual fund) 
investment company that invests the combined contributions of its members in various securities and pays them a dividend (calculated on the average return from these securities) in proportion to their holdings 单位信托投资公司（将信托者的资金集中投资於各种证券, 其收益按比例分与信托者）.
Unitarian
/ 9ju:nI5teErIEn; 9junE`tZrIEn/ n, adj (member) of the Christian religious sect which rejects the doctrine of the Trinity and believes that God is one person一位论派的（信徒）（认为上帝只有一位, 反对三位一体的教义）: the Unitarian Church 一位论派教会. 
Unitarianism 
/ -IzEm; -9IzEm/ n [U].
unite
/ ju:5naIt; ju`naIt/ v  1 [I, Ipr, Tn, Tn.pr] ~ (sb/sth) (with sb/sth) (cause people or things to) become one; come or bring together; join （使人或事物）合为一体, 联合, 合并, 统一, 团结: The two parties have united to form a coalition. 这两个党已结成联盟. * After three years in prison he was again united with his wife and family. 他在狱中关了三年之後, 又与妻子和家里人团圆了. * the common interests that unite our two countries 使我们两国联合起来的共同利益 * The threat of war has united the country behind (ie in support of) its leaders. 国难当头全国人民都团结在领袖的周围.  2 [I, Ipr] ~ (in sth/doing sth) act or work together 联合; 统一; 联合行动; 一齐工作: We should unite in fighting/unite to fight poverty and disease. 我们应该团结起来为消除贫穷和疾病而斗争.
united 
adj  1 joined together by love or sympathy （由爱或同情）结合在一起的; 和睦的: a very united family 很和睦的家庭.  2 resulting from people joining together for a common purpose （为共同目标）团结的, 联合的: make a united effort 一致努力 * present a united front to the enemy 成立联合阵线共同对敌.  3 joined politically （政治上）统一的, 结盟的: the campaign for a united Ireland 争取爱尔兰统一的运动. 
unitedly 
adv.
the United Kingdom (abbr 缩写 (the) UK) 
Great Britain and Northern Ireland （大不列颠及北爱尔兰）联合王国; 英国. =>Usage at great 用法见 great.
the United Nations (abbr 缩写 (the) UN) 
internationalorganization of many countries working for peace throughout the world 联合国.
the United States (of America) (abbrs 缩写 (the) US, USA) 
large country in N America consisting of 50 States and the District of Columbia （美利坚）合众国; 美国.
unity
/ 5ju:nEtI; `junEtI/ n  1 (a) [U] state of being one or a unit; oneness 单一; 唯一; 统一; 一体: The figure on the left spoils the unity of the painting. 画中左边的人物破坏了全幅画的整体性. (b) [C] thing consisting of parts that form a whole 统一的事物; 统一体; 整体.  2 [U](mathematics 数) the number 1 （数字）1.  3 [U] harmonyor agreement (in aims, ideas, feelings, etc) （目标、 思想、 情感等的）和谐, 协调, 和睦, 团结, 一致: live together in unity 和睦地在一起生活 * Christian unity 基督教的合一 * political unity 政治上的一致 * National unity is essential in wartime. 战时举国团结一致十分重要.
Univ
abbr 缩写 = University: London Univ 伦敦大学 * Univ of Salford 索尔福德大学.
universal
/ 9ju:nI5v\:sl; 9junE`v[sl/ adj [esp attrib 尤作定语] of, belonging to, affecting or done by all people or things in the world or in a particular group 全体的; 影响全体的; 全体做的; 共同的: Television provides universalentertainment. 电视提供的是大众的娱乐. * War causes universal misery. 战争给所有的人带来苦难. * universal suffrage, ie the right of all members of a community to vote 普选权 * There is universal agreement on this issue. 在这个问题上, 大家观点一致. * Their proposal met with almost universal condemnation. 他们的提议遭到了几乎所有人的反对.
universality 
/ 9ju:nIv\:5sAlEtI; 9junEv[`sAlEtI/ n [U].
universally 
/ -sElI; -slI/ adv by everyone or in every case普遍地; 人人; 在所有情况下: It is universally acknowledged that... 普遍认为... * The rules do not apply universally. 这些规则并非放诸四海而皆准.
universal joint (also ,universal `coupling) 
joint that connects two shafts in such a way that they can be at any angle to each other 万向接头.
universe
/ 5ju:nIv\:s; `junE9v[s/ n  1 the universe [sing]all existing things, including the earth and its creatures and all the stars, planets, etc in space 宇宙; 世界; 天地万物.  2 [C] system of galaxies 星系; 银河系: Are there other universes outside our own? 在我们的银河系之外还有别的星系吗?
university
/ 9ju:nI5v\:sEtI; 9junE`v[sEtI/ n (a) [C] (colleges,buildings, etc of an) institution that teaches and examinesstudents in many branches of advanced learning, awardingdegrees and providing facilities for academic research 大学, 综合性高等学府（的学院、 建筑物等）: She hopes to go to university next year. 她希望明年能上大学. * [attrib 作定语] a university student, lecturer, professor, etc 大学生、 讲师、 教授. (b) [CGp] members of such an institution collectively 大学师生员工. =>Usage at school1 用法见 school1.
unjust
/ 9Qn5dVQst; Qn`dVQst/ adj not just; not fair or deserved 非正义的; 不公正的; 不公平的; 不该受的: an unjust accusation 不公正的指控. 
unjustly 
adv: She was unjustly imprisoned without trial. 她未经审讯而入狱是不公正的.
unjustifiable
/ Qn5dVQstIfaIEbl; Qn`dVQstE9faIEbl/ adj that cannot be justified or excused 无法证明为正当的; 无可辩解的; 不可原谅的: His behaviour was quite unjustifiable. 他的行为毫无道理. 
unjustifiably
/-EblI; -EblI/ adv.
unkempt
/ 9Qn5kempt; Qn`kZmpt/ adj not kept tidy; looking dishevelled or neglected 不整洁的; 凌乱的; 疏於整理的: unkempt hair 蓬乱的头发 * He had an unkempt appearance. 他仪容不整. * The garden looks very unkempt. 花园显得凌乱不堪.
unkind
/ 9Qn5kaInd; Qn`kaInd/ adj not having or showing kindness; cruel or harsh 不亲切的; 不和蔼的; 不厚道的; 不仁慈的; 残忍的; 苛刻的: an unkind remark 刻薄的言语 * Don't be so unkind to your brother. 别对你弟弟那麽凶.
unkindly 
adv in an unkind manner 不亲切地; 不和蔼地; 不厚道地; 不仁慈地; 残忍地; 苛刻地: Please don'ttake my remarks unkindly, ie think I intend to be unkind in saying this. 请不要把我的话往坏处想.
unkindness 
n [U, C].
unknowing
/ Qn5nEUIN; Qn`noIN/ adj [usu attrib 通常作定语] not knowing; unaware; unwitting 不知道的; 未意识到的; 未察觉的: He was the unknowing cause of all the misunderstanding. 这一切误会都是他在无意中造成的. 
unknowingly 
adv: All unknowingly, she had been waiting for hours in the wrong place. 她记错了地方, 在那儿等了半天一直未发觉.
unknown
/ 9Qn5nEUn; Qn`non/ adj ~ (to sb)  1 not known or identified 未知的; 不详的; 未被认识的; 未认出的: The side-effects of the drug are as yet unknown (toscientists). 这种药的副作用（科学家）尚未发现. * Unknownforces were at work to overthrow the government. 有些尚未查明的势力正在活动图谋推翻政府.  2 not famous or well known; unfamiliar 不出名的; 不闻名的; 不熟悉的; 陌生的: The star of the film is a previously unknown actor. 这部电影里的明星以前是个默默无闻的演员.  3 (idm 习语) an ,unknown `quantity person or thing that one has no experience of and whose nature, significance, etc one therefore cannot predict 不了解的人或事物（因而无法估量其特点、 重要性等）: The new sales director is still a bit of an unknown quantity. 新来的销售部主任大家还不大了解. unknown to sb without the knowledge of sb 不为某人所知: Quite unknown to me, she'd gone ahead and booked the holiday. 在我完全不了解的情况下, 她已先行办好了度假的预订手续.
unknown 
n (a) (usu 通常作 the unknown) [sing] thing, place, etc that is unknown 未知的或不了解的事物、 地方等: a journey into the unknown 前往陌生地方之行 * fear of the unknown 对不了解的事物的恐惧. (b) [C] person who is not well known 不出名的人: The leading role is played by a complete unknown. 演主角的是一个毫无名气的演员. (c) [C] (mathematics 数) quantity that is not yet determined 未知元; 未知数; 未知量: x and y are unknowns. x和y代表两个未知数.
unlace
/ Qn5leIs; Qn`les/ v [Tn] undo the laces of (esp shoes); unfasten or loosen (sth) by slackening its laces 解开（尤指鞋）的带子; 解开带子以放开或松开（某物）.
unladen
/ 9Qn5leIdn; Qn`ledn/ adj not loaded 未装载的: ,unladen `weight, ie the weight of a vehicle with nothing loaded into or onto it 无载重, 空车重（未装货的车的重量）.
unlawful
/ 9Qn5lR:fl; Qn`lRfEl/ adj (fml 文) against the law; illegal 不合法的; 非法的: unlawful assembly 非法集会 * a verdict of unlawful killing 做出的不合法杀害的裁决.
unlawfully 
/ -fElI; -fElI/ adv.
unlearn
/ 9Qn5l\:n; Qn`l[n/ v [Tn] cause (sth) to be no longer in one's knowledge or memory 从观念或记忆中清除（某事物）: You must start by unlearning all the bad habits your previous piano teacher taught you! 你得先改掉以前钢琴老师教给你的一切坏习惯!
unleash
/ Qn5li:F; Qn`liF/ v [Tn, Tn.pr] ~ sth (against/on sb/sth) (a) set sth free from a leash or restraint 解开带子或去掉限制以放开（某事物）: unleash the guard dogs 解开带子放出警卫犬. (b) (fig 比喻) set sth free from control; release sth in a powerful attack (on sb/sth) 使某物不受控制; 放出某物对（某人[某物]）进行强有力的攻击: unleash the forces of nuclear power 发出核动力的攻击力 * He unleashed a torrent of abuse againstthe unfortunate shop assistant. 他对那倒霉的店员骂不绝口.
unleavened
/ 9Qn5levnd; Qn`lZvEnd/ adj (of bread) madewithout yeast or other raising agent （指面包）未使用酵母或其他发酵剂的, 未经发酵的.
unless
/ En5les; En`lZs/ conj if...not; except if or except when 如果不; 除非; 除非在...的时候: You'll fail in French unless you work harder. 你要是不再加把劲儿, 法语就考不及格了. * Unless England improve their game they're going to lose the match. 英格兰队如果不改进打法, 就会输掉这场比赛. * I wouldn't be saying this unless I were sure of the facts. 要是我对这些事情没有把握, 我就不说这话了. * Come at 8 o'clock unless I phone, eg to tell you a different time. 请8点钟来, 如果我不打电话 的话. * I sleep with the window open unless it`s really cold. 我总是开著窗户睡觉, 除非天气非常冷才关上窗户.
unless
NOTE ON USAGE 用法: Unless and if...not can often be used in the same way *unless和if...not的用法常常是相同的: Follow the green signs unless you have goods to declare/if you haven't any goods to declare. 未携须申报货物者, 沿绿色标记通行. Unless cannot be used when referring to the result of something not happening and is, therefore, not used in `imaginary' conditional sentences *unless不可用以指尚未发生的事情之结果, 因而不可用於｀假想的＇条件句中: We would have had a lovely holiday if it hadn't rained (NOT unless it had rained) every day. 要不是天天下雨的话, 我们的假日就过得痛快了. （本句中不可用unless it had rained.） *  I'll be sorry if she doesn't come (NOT unless she comes) to the party. 万一她不来参加聚会, 我就感到太遗憾了. （本句中不可用unless she comes.） Unless(not if...not) is often used to introduce an afterthought,ie something added to the main statement *unless（并非if...not）常用以引导出补充前言的话, 即是对刚说过的话想到要加些补充: She hasn't got any hobbies unless you call watching TV a hobby. 她没有任何嗜好--除非把看电视也算作嗜好的话. *  Have a cup of tea  unless you'd prefer a cold drink. 喝一杯茶吧--除非你想喝冷饮.
unlettered
/ 9Qn5letEd; Qn`lZtLd/ adj (fml 文) unable to read; uneducated 文盲的; 未受教育的; 没有文化的. Cf 参看 illiterate.
unlike
/ Qn5laIk; Qn`laIk/ adj [pred 作表语] dissimilar; different 不相似; 不同: They are so unlike nobody would believe they were sisters. 她们毫无相似之处, 谁也不相信她们是姐妹.
unlike 
prep  1 different from (sth); not like 与（某事物）不同; 不像...: Her latest novel is quite unlike her earlier work. 她最近的小说与她以前的作品截然不同. * The scenery was unlike anything I'd seen before. 这风景跟我过去见到过的都不一样. * Their celebrations at Christmas are not unlike our own. 他们的圣诞节庆祝活动跟我们自己的并无不同.  2 uncharacteristic of (sb/sth)无（某人[某事物]）的特性: It's very unlike him to be so abrupt. 他这麽粗鲁可不像他平时的样子.  3 in contrast to (sb) 与（某人）相反: Unlike me, my husband likes to stay in bed. 我丈夫与我相反, 喜欢睡懒觉. * I was very interested in the lecture, unlike many of the students. 我跟许多同学不同, 我很喜欢听这个课. * He managed to finish the race, unlike more than half of the competitors. 他在比赛中坚持跑完了全程, 不像大部分选手那样半途而废.
unlikely
/ Qn5laIklI; Qn`laIklI/ adj (-ier, -iest) (a) not likely or expected to happen 不大可能发生的; 未必会发生的: It is unlikely to rain/that it will rain. 不太可能下雨. * There is unlikely to be rain. 不太可能有雨. * His condition is unlikely to improve. 他的境况不大可能好转. * In the unlikely event of a strike, production would be badly affected. 罢工未必能发生, 若一旦发生, 生产势必受到严重影响. (b) [attrib 作定语] not likely to be true; improbable 不大可能是真实的; 不大可能的: an unlikely tale, excuse, explanation, etc 不太像真实的说法、 托词、 解释等. (c) not expected to succeed 未必会成功的: the most unlikely candidate 最不大可能当选的候选人 * an unlikely couple, ie two people who do not seem to be well suited to each other 不大般配的二人.
unlimited
/ 9Qn5lImItId; Qn`lImItId/ adj not limited; very great in number or quantity 无限的; （数或量）极大的: If only one had an unlimited supply of money! 要是财源不断就好了!
unlined
/ 9Qn5laInd; Qn`laInd/ adj  1 without a lining 无衬里的: a ,cheap ,unlined `coat 无衬里的廉价大衣 * Thebox was rough and unlined. 这个盒子很粗糙又没有衬里.  2 not marked with lines 无线条的; 无皱纹的: ,unlined `paper 无条格的纸 * a ,smooth ,unlined complexion 光滑而无皱纹的面部皮肤.
unlisted
/ 9Qn5lIstId; Qn`lIstId/ adj (a) not in a published list (esp of Stock Exchange prices) 未列表公布的（尤指证券价格）; （证券）不上市的, 未上市的: an unlisted company 未上市的公司. (b) (US) = ex-directory: He/His number is unlisted. 他[他的电话号码]未列入电话簿.
unload
/ 9Qn5lEUd; Qn`lod/ v  1 (a) [I, Tn, Tn.pr] ~ sth (from sth) remove a load from (sth); remove (a load) from sth 从（某物）上卸下货物; 从某物上卸下（货物）: Dockers started unloading (the ship). 码头工人开始卸船. * unload shopping from a car 从汽车上卸下采购的物品. (b) [Tn] remove the charge from (a gun, etc) or the film from (a camera) 从（枪、 炮等）中退出弹药; 从（照相机）中取出胶卷.  2 [I, Tn] (of vehicles, vessels etc) have (a load) removed （指车辆、 船舶等）卸下（负载）: Lorries may only park here when loading or unloading. 卡车非装卸货物时不得在此停车.  3 [Tn, Tn.pr] ~ sb/sth (on/onto sb) (infml 口) pass sb/sth unwanted (to sb else); get rid of sb/sth 把不想要的某人[某物]交给（他人）; 摆脱某人[某事物]: Do you mind if I unload the children onto you this afternoon? 今天下午我把孩子托付给你, 你不介意吧? Cf 参看 off-load.
unlock
/ 9Qn5lCk; Qn`lBk/ v [Tn]  1 unfasten the lock of (a door, etc) using a key （用钥匙）开（门等）的锁: unlock the gate 打开大门的锁.  2 release (sth) by, or as if by, unlocking 开锁或似开锁般释放（某事物）: exploration to unlock the secrets of the ocean bed 揭开大洋底部秘密的探险.
unlooked-for
/ Qn5lUkt fR:(r); Qn`lJkt9fRr/ adj (fml 文) not expected; unforeseen 未预料的; 未预见到的: unlooked-for compliments, difficulties 出乎意外的赞扬、 困难.
unloose
/ 9Qn5lu:s; Qn`lus/ (also unloosen / Qn5lu:sn; Qn`lusEn/) v [Tn] make (sth) loose; untie 放松, 放开（某物）; 解开: unloose the rope around one's waist 解开系在腰上的绳子 * He unloosened his collar. 他把领口敞开了. =>Usage at loose1 用法见 loose1.
unlucky
/ Qn5lQkI; Qn`lQkI/ adj not lucky; having or bringing bad luck; unfortunate 不幸的; 倒霉的; 运气不好的: I always seem to be unlucky at cards. 我玩纸牌似乎总是手气不好. * He was unlucky enough to lose his keys. 他把钥匙丢了, 真够倒霉的. * The number thirteen is often considered unlucky. 十三这个数字常常认为是个不吉利的数字. * an unlucky attempt, ie one that did not succeed 一次运气不佳的尝试（未成功）.
unluckily 
adv unfortunately 不幸地; 不吉利地; 遗憾地: Unluckily (for Peter) he did not get the job. （彼得）他可真不走运, 没能获得那份工作.
unlucky
/ Qn5lQkI; Qn`lQkI/ adj not lucky; having or bringing bad luck; unfortunate 不幸的; 倒霉的; 运气不好的: I always seem to be unlucky at cards. 我玩纸牌似乎总是手气不好. * He was unlucky enough to lose his keys. 他把钥匙丢了, 真够倒霉的. * The number thirteen is often considered unlucky. 十三这个数字常常认为是个不吉利的数字. * an unlucky attempt, ie one that did not succeed 一次运气不佳的尝试（未成功）.
unluckily 
adv unfortunately 不幸地; 不吉利地; 遗憾地: Unluckily (for Peter) he did not get the job. （彼得）他可真不走运, 没能获得那份工作.
unlucky
/ Qn5lQkI; Qn`lQkI/ adj not lucky; having or bringing bad luck; unfortunate 不幸的; 倒霉的; 运气不好的: I always seem to be unlucky at cards. 我玩纸牌似乎总是手气不好. * He was unlucky enough to lose his keys. 他把钥匙丢了, 真够倒霉的. * The number thirteen is often considered unlucky. 十三这个数字常常认为是个不吉利的数字. * an unlucky attempt, ie one that did not succeed 一次运气不佳的尝试（未成功）.
unluckily 
adv unfortunately 不幸地; 不吉利地; 遗憾地: Unluckily (for Peter) he did not get the job. （彼得）他可真不走运, 没能获得那份工作.
unmade
/ 9Qn5meId; Qn`med/ adj (of a bed) with the bedclothes not neatly arranged for sleeping in （指床）未铺好的: She rushed off to work leaving her bed unmade. 她匆忙去上班连床都没铺好.
unmade
/ 9Qn5meId; Qn`med/ adj (of a bed) with the bedclothes not neatly arranged for sleeping in （指床）未铺好的: She rushed off to work leaving her bed unmade. 她匆忙去上班连床都没铺好.
unman
/ 9Qn5mAn; Qn`mAn/ v (-nn-) [Tn] (arch or rhet古或修辞) weaken the self-control or courage of (a man)削弱（某男子）的自制力或勇气: Unmanned by grief he broke down and wept. 他悲伤得不像个男子汉不禁哭了起来.
unmanly
/ Qn5mAnlI; Qn`mAnlI/ adj (of behaviour) uncharacteristic of or inappropriate for men （指行为）无男子特性的, 不适於男子的: It was once thought unmanly not to drink and smoke. 身为男子不抽烟不喝酒曾视为无男子气概.
unmanned
pt, pp of unman.
unmanned
/ 9Qn5mAnd; Qn`mAnd/ adj not manned; operated automatically or without a crew 无人的; 无人操纵的; 自动的: ,unmanned `railway signals 自动控制的铁路信号 * send an unmanned spacecraft to Mars 把无人驾驶的宇宙飞船发射到火星上去.
unmannerly
/ Qn5mAnElI; Qn`mAnLlI/ adj (fml derog 文, 贬) without good manners; ill-mannered 没有礼貌的; 粗野的: unmannnerly conduct 无礼的行为.
unmarried
/ 9Qn5mArId; Qn`mArId/ adj not married; single 未婚的; 独身的: an ,unmarried `mother, `couple 未婚的母亲、 一对情侣.
unmask
/ 9Qn5mB:sk; ?@ -5mAsk; Qn`mAsk/ v  1 [I, Tn]remove a mask from (sb) 除去（某人）的面具: The revellersunmasked (ie took off their masks) at midnight. 狂欢的人在午夜摘下了面具.  2 [Tn] reveal the true character of (sb/sth); expose 使（某人[某事物]）露出真相; 揭露; 暴露: unmask the culprit 揭露罪犯的真面目 * unmask a plot 揭露阴谋.
unmatched
/ 9Qn5mAtFt; Qn`mAtFt/ adj that cannot be matched; without an equal; matchless 不相配的; 无双的; 无比的: an achievement that remains unmatched to this day 迄今无可匹敌的成就.
unmentionable
/ Qn5menFEnEbl; Qn`mZnFEnEbl/ adj [usu attrib 通常作定语] too shocking or embarrassing to be mentioned or spoken about 说不出口的, 不堪提起的（因说出来会令人震惊或难堪）: an unmentionable disease, eg venereal disease 难以明说的疾病（如性病）.
unmentionables 
n [pl] (arch euph or joc 古, 婉或谑) unmentionable people or things (esp underwear) 不宜提到的人或事物; （尤指）内衣.
unmindful
/ Qn5maIndfl; Qn`maIndfEl/ adj [pred 作表语] ~ of sb/sth (fml 文) not considering sb/sth; forgetting sb/sth 对某人[某事物]不加考虑或不理会: He worked on, unmindful of the time. 他一直工作, 没理会时间.
unmistakable
/ 9QnmI5steIkEbl; 9QnmE`stekEbl/ adj clearlyrecognizable or obvious; impossible to mistake for sb/sth else 明显的; 明白无误的; 不会弄错的: the unmistakable sound of an approaching train 清清楚楚的火车驶近的声音. 
unmistakably 
/ -EblI; -EblI/ adv.
unmitigated
/ Qn5mItIgeItId; Qn`mItE9^etId/ adj [usu attrib通常作定语] (of sth/sb bad) having no accompanying advantages whatever; complete; absolute （指坏事物[坏人]）一无是处的, 十足的, 绝对的: an unmitigated disaster, scoundrel 十足的灾难、 坏蛋.
unmoved
/ 9Qn5mu:vd; Qn`muvd/ adj [pred 作表语] not affected by feelings of pity, sympathy, etc 不为怜悯、 同情等感情所打动; 不受感动: It's impossible to remain unmoved by the reports of the famine. 了解到报道的饥荒情况不可能无动於衷.
unnatural
/ Qn5nAtFrEl; Qn`nAtFrEl/ adj  1 not natural or normal; differing from what is the usual or expected 不自然的; 不正常的; 反常的; 出乎意料的: His face turned an unnatural shade of purple. 他气得脸色发紫, 十分难看. * It was unnatural for the room to be so tidy. 房间竟然这样整洁, 真出乎所料.  2 (derog 贬) (a) contrary to usual and generally accepted behaviour 行为反常而不合情理的: unnatural sexual desires 变态的性欲. (b) extremely cruel or wicked 极残酷的; 极邪恶的: the unnatural murder of his own father （他）丧尽天良的弑父.  3 not sincere; affected or forced 虚假的; 做作的; 勉强的: an unnatural high-pitched laugh 装出的尖声大笑. 
unnaturally 
/ -rElI; -rElI/ adv: Not unnaturally, she was greatly upset by her father's sudden death. 她父亲突然去世她悲痛不已, 这也是人之常情. * an unnaturally jovial manner 强颜欢笑.
unnecessary
/ Qn5nesEsrI; ?@ -serI; Qn`nZsE9sZrI/ adj (a) [usu pred 通常作表语] not necessary or desirable; superfluous 不需要; 不必要; 多余: It's unnecessary to cooka big meal tonight. 今晚不必做很多饭. (b) [usu attrib通常作定语] more than necessary; excessive 超过需要的; 过度的: unnecessary expense 多余的开销. (c) (of remarks, etc) not required in a situation and likely to be offensive; gratuitous （指言语等）无必要而可能得罪人的, 没来由的: an unnecessary reference to his criminal past 何必提到他的前科. 
unnecessarily 
/ 9Qn5nesEsrElI; ?@ 9Qn9nesE5serElI; 9QnnZsE`sZrElI/ adv.
unnerve
/ 9Qn5n\:v; Qn`n[v/ v [Tn] cause (sb) to lose self-control, confidence or courage 使（某人）失去自制力、 信心或勇气: His encounter with the guard dog had completely unnerved him. 他遇上了警卫犬, 把他吓坏了. 
unnerving 
adj: She found the whole interview rather unnerving. 她觉得整个面试都让人气馁.
unnoticed
/ 9Qn5nEUtIst; Qn`notIst/ adj [usu pred 通常作表语] not observed or noticed 未被察觉到; 未被注意到: The event passed unnoticed. 那件事谁也没注意到. * I can't let this act of kindness go unnoticed. 我不能让这种好人好事湮没无闻.
unnumbered
/ 9Qn5nQmbEd; Qn`nQmbLd/ adj  1 having no number(s) 无号数的; 未编号的: unnumbered tickets/seats, eg at a concert hall or theatre 不对号的票[座位]（如音乐会或戏院的）.  2 (arch or rhet 古或修辞) more than can be counted; countless 不可胜数的; 数不清的; 无数的: the unnumbered stars 繁星.
UNO
/ 5ju:nEU; `juno/ abbr 缩写 = United Nations Organization 联合国组织.
unobtrusive
/ 9QnEb5tru:sIv; 9QnEb`trusIv/ adj (usuapprov 通常作褒义) not too obvious or easily noticeable; not drawing attention to itself or himself; discreet 不太显著的; 不引人注目的; 不招摇的; 谨慎的: an unobtrusive but pleasing design 悦目而不扎眼的图案 * He was so quiet and unobtrusive that you would hardly know he was there! 他很文静, 简直注意不到他在那儿! 
unobtrusively 
adv: She slipped away from the party unobtrusively. 她从聚会上悄悄地溜走了.
unoccupied
/ 9Qn5CkjUpaId; Qn`BkjE9paId/ adj  1 not occupied; empty; vacant 未被占用的; 空的; 无人住的: find an unoccupied table 找一张无人占用的桌子 * The house had been left unoccupied for several years. 这所房子已经几年无人居住了.  2 (of a region or country) not under the control of foreign troops （指地区或国家）未被敌军占领的, 未沦陷的: unoccupied territory 未沦陷的领土.  3 not busy; idle 不忙碌的; 空闲的: in one of her rare unoccupied moments 在她难得的一段空闲时间.
unofficial
/ 9QnE5fIFl; 9QnE`fIFEl/ adj not official 非官方的; 非正式的: an ,unofficial `strike, ie one not authorizedby the union 非正式的罢工（未经工会认可的） * an,unofficial `statement, ie one not authorized for release to the public 非官方的声明（未经批准而向公众发布的声明） * ,unofficial `news, ie not confirmed by official sources or authorities 非官方新闻（未经官方证实的）. 
unofficially 
/ -FElI; -FElI/ adv.
unorthodox
/ 9Qn5R:WEdCks; Qn`RrWE9dBks/ adj not in accordance with what is orthodox, conventional or traditional 非正统的; 非正规的; 非传统的: unorthodoxbeliefs, opinions, etc 非正统的信仰、 见解等 * unorthodoxteaching methods 非传统的教学法 * She has an unorthodox technique, but is an excellent player. 她不是科班出身, 但却身手不凡. Cf 参看 heterodox.
unpack
/ 9Qn5pAk; Qn`pAk/ v (a) [I, Tn] take packed things out of (sth) 由（某物）中取出所包装之物; 打开（包装）取出某物: Let's unpack before we go to bed. 咱们打开行李再睡觉吧. * a half-unpacked suitcase 已取出一半衣物的手提箱. (b) [Tn, Tn.pr] ~ sth (from sth) take out (things packed) 取出（包装之物）: unpack the books from the box 从箱子里把书拿出来.
unpaid
/ 9Qn5peId; Qn`ped/ adj  1 (a) not yet paid 未支付的; 未缴纳的: an ,unpaid `bill/`debt 未付讫的帐单[未偿还的债款]. (b) ~ for not paid for 未付款的; 未清帐的: The car is three years old and still unpaid for. 这汽车用了三年还没付购车款呢.  2 (a) (of people) not receiving payment for work done （指人）不得到报酬的, 无偿工作的: an ,unpaid `baby-sitter 无报酬的临时保姆. (b) (of work) done without payment to the worker(s) （指工作）无报酬的, 无偿的: ,unpaid `labour 无偿的劳动.
unpalatable
/ Qn5pAlEtEbl; Qn`pAlEtEbl/ adj (fml 文)  1 not palatable; unpleasant to taste 不好吃的; 不可口的; 味道不好的: The fish was particularly unpalatable. 这鱼特别难吃.  2 (fig 比喻) unpleasant or unacceptable to the mind 使人不快的; 无法认同的: His views on capital punishment are unpalatable to many. 他对死刑存废的见解许多人都不以为然. 
unpalatably 
/ -EblI;-EblI/ adv.
unparalleled
/ Qn5pArEleld; Qn`pArE9lZld/ adj having no parallel or equal; unmatched 无比的; 无双的; 无匹的: an economic crisis unparalleled in modern times 现代无两的经济危机.
unparliamentary
/ 9Qn9pB:lE5mentrI; 9QnpBrlE`mZntrI/ adj (derog 贬) contrary to the accepted rules of behaviourin Parliament (because abusive or disorderly) 违反议会行为准则的（因出言不逊或扰乱秩序）: unparliamentary language, conduct 违反议会惯例的语言、 行为.
unpick
/ 9Qn5pIk; Qn`pIk/ v (a) [Tn, Tn.pr] ~ sth (from sth) take out (the stitches) 拆开（缝线）: unpick the stitches from a curtain 拆开窗帘的缝线. (b) [Tn] take out the stitches from (sth) 拆去（某物）的缝线: unpick a hem, seam, etc 拆去布边、 接缝处等的缝线.
unplaced
/ 9Qn5pleIst; Qn`plest/ adj not one of the first three to finish in a race or contest （比赛）未获前三名的.
unplayable
/ 9Qn5pleIEbl; Qn`pleEbl/ adj  1 (in games, of a ball) that cannot be played （比赛等, 指球）无法打的.  2 (of ground) not fit to be played on （指场地）不适宜比赛的.  3 (of music) too difficult to be played （指音乐）难以演奏的.
unpleasant
/ Qn5pleznt; Qn`plZznt/ adj not pleasant; disagreeable 使人不愉快的; 不合意的: unpleasant smells,weather 讨厌的气味、 天气 * an unpleasant surprise 使人 不愉快的意外事 * I found his manner extremely unpleasant.我觉得他的态度讨厌极了.
unpleasantly 
adv.
unpleasantness 
n [C, U] (instance of) bad feeling or quarrelling between people 恶感; 争执; 不和: I want to avoid any unpleasantness with the neighbours. 我要避免与邻居有任何不快.
unplug
/ 9Qn5plQg; Qn`plQ^/ v (-gg-) [Tn]  1 disconnect (an electrical appliance) by removing its plug from the socket 拔出（电器）的电源插头: Please unplug the TV before you go to bed. 临睡前请拔下电视机的插头.  2 remove an obstruction from (sth) 除去（某物）的障碍物: The drain is blocked and needs unplugging. 排水管堵塞了, 得疏通一下.
unpopular
/ 9Qn5pCpjUlE(r); Qn`pBpjElL/ adj ~ (with sb) not popular; not liked or enjoyed by a person, a group or people in general 不得人心的; 不受欢迎的:an unpopular decision 不得人心的决议 * She's rather unpopular with her boss at the moment. 老板现在不太待见她. 
unpopularity 
/ 9Qn9pCpjU5lArEtI; Qn9pBpjE`lArEtI/ n [U].
unpractised
/ Qn5prAktIst; Qn`prAktIst/ adj having little experience; inexpert; unskilled 无经验的; 不内行的; 不熟练的.
unprecedented
/ Qn5presIdentId; Qn`prZsE9dZntId/ adj without precedent; never having happened, been done or been known before 无前例的; 前所未有的; 空前的: unprecedented levels of unemployment 失业率达到的前所未有的严重程度 * a situation unprecedented in the history of the school 该校自有校史以来未曾出现过的情况.
unpredictable
/ 9QnprI5dIktEbl; 9QnprI`dIktEbl/ adj (a) that cannot be predicted 无法预料的; 不可预知的: an unpredictable result 难以预料的结果. (b) (of a person) whose behaviour cannot be predicted; changeable; unstable（指人）行为难以预知的, 易变的, 不稳定的: You never know how she'll react: she's so unpredictable. 谁也不知道她反应如何, 她这个人反覆无常.
unprejudiced
/ 9Qn5predVUdIst; Qn`prZdVEdIst/ adj free from prejudice; not biased 无偏见的; 无成见的; 公正的.
unpremeditated
/ 9Qnpri:5medIteItId; 9QnprI`mZdE9tetId/ adj not previously and deliberately considered or planned; spontaneous 未经事先慎重考虑或计画的; 自发的: an unpremeditated attack 非预谋的攻击.
unprepossessing
/ 9Qn9pri:pE5zesIN; 9QnpripE`zZsIN/ adj (fml 文) not attractive or appealing in appearance（外表）不吸引人的, 不讨人喜欢的: Though unprepossessingto look at he is highly intelligent. 他虽然相貌平平, 但却很有才气.
unpretentious
/ 9QnprI5tenFEs; 9QnprI`tZnFEs/ adj (approv褒) not showy or pompous; modest 不炫耀的; 不夸大的; 谦逊的: an unpretentious little book but one that tells a simple story well 把一个简单的故事讲得很生动的朴实无华的书.
unprincipled
/ Qn5prInsEpld; Qn`prInsEpld/ adj (fml 文) without moral principles; unscrupulous; dishonest 不道德的; 肆无忌惮的; 不诚实的: unprincipled behaviour 不道德的行为 * an unprincipled rogue 无耻的恶棍.
unprintable
/ Qn5prIntEbl; Qn`prIntEbl/ adj (of words, articles, etc) too offensive or indecent to be printed （指词语、 文章等）（因有攻击性或下流）不宜印出的: I'm afraid that my views on their private life are unprintable! 我自忖我对他们私生活的看法不印出也罢!
unprofessional
/ 9QnprE5feFEnl; 9QnprE`fZFEnl/ adj (derog贬)  1 (esp of conduct) contrary to the standards expected in a particular profession （尤指行为）违反职业准则的: The board considers your behaviour highly unprofessional. 董事会认为你的行为严重违反职业道德.  2 (of a piece of work, etc) not done with the skill or care of a trained professional （指一件工作等）未按专业水平做的: He made a very unprofessional job of putting up the garden shed for us. 他给我们搭的花园棚屋很没水平.
unprofessionally 
/ -FEnElI; -FEnlI/ adv.
unprompted
/ 9Qn5prCmptId; Qn`prBmptId/ adj (of an answer or action) not said or done, etc as the result of a hint, suggestion, etc; spontaneous （指回答或行动）未经提示做出的, 自发的: an unprompted offer of help 主动的提出帮助.
unpronounceable
/ 9QnprE5naUnsEbl; 9QnprE`naJnsEbl/ adj (of a word, esp a name) too difficult to pronounce （指字, 尤指名字）难得发不成音的.
unprovided
/ 9QnprE5vaIdId; 9QnprE`vaIdId/ adj (fml 文) ~ for without provision having been made for 无供给的; 无生活来源的: The widow was left unprovided for, ie No money, etc had been left for her on her husband's death. 她成了寡妇而失去了生计.
unprovoked
/ 9QnprE5vEUkt; 9QnprE`vokt/ adj (esp of verbal or physical violence) without provocation; not caused by previous action （尤指暴力言行）未受招惹而自发的, 无缘无故的: ,unprovoked aggression/attacks 无端的侵犯[攻击].
unpunished
/ 9Qn5pQnIFt; Qn`pQnIFt/ adj [pred 作表语] not punished 未受惩罚: Such a serious crime must not go unpunished. 这种严重罪行不可不受惩罚.
unputdownable
/ 9QnpUt5daUnEbl; 9QnpJt`daJnEbl/ adj (infml 口) (of a book, etc) so interesting or absorbing that the reader is reluctant to stop reading until he has finished it （指书等）爱不忍释的, 不忍释手的.
unqualified
/ Qn5kwClIfaId; Qn`kwBlE9faId/ adj  1 (a) ~ (as sth/for sth/to do sth) without legal or official qualifications for doing sth 无资格的; 不合格的: an unqualified instructor 不合格的教师 * unqualified as a teacher/for teaching 无资格当教师[任教]. (b) [pred 作表语] ~ to do sth (infml 口) not competent or knowledgeable enough to do sth 不能胜任; 学识不够: I feel unqualified to speak on the subject. 我自觉无资格就此问题发言.  2 [usu attrib 通常作定语] not limited or restricted; absolute 无限制的; 无束缚的; 绝对的: unqualified praise 称赞不已 * an unqualified success 完全的胜利.
unquestionable
/ Qn5kwestFEnEbl; Qn`kwZstFEnEbl/ adj beyond doubt; certain; indisputable 无疑的; 确实的; 无可争辩的: His honesty is unquestionable. 他很诚实, 这是毫无疑问的.
unquestionably 
/ -EblI; -EblI/ adv.
unquestioned
/ Qn5kwestFEnd; Qn`kwZstFEnd/ adj notdisputed or doubted 无争议的; 不容置疑的: an unquestionedfact 无可怀疑的事实 * Her authority is unquestioned. 她的权威是公认的.
unquestioning
/ Qn5kwestFEnIN; Qn`kwZstFEnIN/ adj done,etc without asking questions, expressing doubt, etc 不提出疑问的; 不表示怀疑的; 无异议的: He demands unquestioning obedience from his followers. 他要求追随者对他绝对服从. 
unquestioningly 
adv.
unquiet
/ Qn5kwaIEt; Qn`kwaIEt/ adj [usu attrib 通常作定语] (fml 文) restless; uneasy; disturbed 不安的; 不宁的; 烦扰的: all the signs of an unquiet mind 心烦意乱的表现.
unquote
/ Qn5kwEUt; Qn`kwot/ n (idm 习语) quote (...unquote) =>quote n.
unravel
/ Qn5rAvl; Qn`rAvl/ v (-ll-; US -l-) [I, Tn]  1 (cause sth woven, knotted or tangled to) separate into strands （使编织、 编结或纠结之物）解开, 拆开: My knitting has unravelled. 我编织的东西散开了. * unravel a cardigan, a ball of string 把对襟毛衣、 一团细绳拆开. Cf 参看 ravel.  2 (fig 比喻) (cause sth to) becomeclear or solved （使某事物）变清楚或获解决: The mysteryunravels slowly. 那件神秘的事渐渐明朗了. * unravel a plot, puzzle, etc 揭露阴谋、 解决难题.
unread
/ 9Qn5red; Qn`rZd/ adj  1 (of a book) that has not been read （指书）未经阅读的, 尚未审阅的: a pile of,unread `novels 一堆未看过的小说.  2 (of a person) not having read many books, etc （指人）读书不多的, 不学无术的: She knows so much that she makes me feel very unread. 她懂的事情很多, 相形之下我觉得自己很无知.
unreadable
/ 9Qn5ri:dEbl; Qn`ridEbl/ adj  1 (derog 贬) too dull or too difficult to be worth reading （因枯燥或艰涩）不值一读的.  2 = illegible.
unreal
/ 9Qn5rIEl; Qn`rIEl/ adj (of an experience) not seeming real; imaginary; illusory （指经历）不真实的, 想像的, 虚幻的: The whole evening seemed strangely unreal. 整个晚上的事似乎如梦幻般令人生奇. 
unreality
/ 9QnrI5AlEtI; 9QnrI`AlEtI/ n [U].
unreasonable
/ Qn5ri:znEbl; Qn`riznEbl/ adj  1 (of people) not reasonable in attitude, etc （指人）不讲道理的.  2 going beyond the limits of what is reasonable or just; excessive 超越情理的; 不合理的; 过分的: make unreasonable demands on sb 对某人提出无理的要求.
unreasonably 
/ -EblI; -EblI/ adv.
unreasoning
/ Qn5ri:zEnIN; Qn`riznIN/ adj (fml 文) (of a person or of attitudes, beliefs, etc) not using or guided by reason （指人或指态度、 信仰等）不凭理智的, 无理性的: an unreasoning fear of foreigners 对外国人无缘由的恐惧.
unreel
/ 9Qn5ri:l; Qn`ril/ v [I, Tn] (cause sth to) unwind from a reel （使某物）（从卷轴中）转开, 展开: Unreel the hose fully before use. 把水龙完全展开再使用.
unrelenting
/ 9QnrI5lentIN; 9QnrI`lZntIN/ adv (a) not reducing in intensity, etc; continuous; relentless （强度等）未降低的; 持续的; 不间断的: unrelenting pressure 持续的压力. (b) (of a person) merciless; unwilling to relent（指人）冷酷的, 不愿宽容的: a cruel and unrelenting master 残酷无情的主人.
unrelentingly 
adv: The rain continued unrelentingly. 雨一个劲儿地下个不停.
unremitting
/ 9QnrI5mItIN; 9QnrI`mItIN/ adj never relaxingor ceasing; incessant; persistent 不放松的; 不停止的; 不间断的; 坚持的: unremitting care, boredom, drudgery 无休止的操心、 厌倦感、 繁重工作.
unrepeatable
/ 9QnrI5pi:tEbl; 9QnrI`pitEbl/ adj  1 that cannot be repeated or done again 不可重复的; 不可再做的: unrepeatable bargains/offers, ie at specially low prices 仅此一次的大减价.  2 too indecent or offensive to be said again （因下流或有攻击性）不宜重述说出的: His remarks were quite shocking  unrepeatable, in fact. 他说的话太让人难堪--真无法再说出口.
unrequited
/ 9QnrI5kwaItId; 9QnrI`kwaItId/ adj (fml 文) (esp of love) not returned or rewarded （尤指爱情）得不到回应或报答的: unrequited passion 单相思.
unreserved
/ 9QnrI5z\:vd; 9QnrI`z[vd/ adj  1 (of seats, etc) not reserved for or allocated to a particular personin advance （指座位等）未被预订的, 未保留的: We alwayskeep a few unreserved tables. 我们总留几张桌子不预订出去.  2 (fml 文) without any holding back; complete 无保留的; 完全的: Do I have your unreserved attention? 你是完全听著我说话呢吗?
unreservedly 
/ 9QnrI5z\:vIdlI; 9QnrI`z[vIdlI/ adv without reservation or restriction; openly 无保留地; 无限制地; 公开地: apologize unreservedly 坦诚地道歉.
unrest
/ 9Qn5rest; Qn`rZst/ n [U] (state of) restlessness or dissatisfaction; disturbance 不安; 不满意; 动荡: civil/industrial/political/social unrest 国内的[工业的/政治的/社会的]动乱.
unrestrained
/ 9QnrI5streInd; 9QnrI`strend/ adj not restrained; not held back or controlled; unchecked 不受抑制的; 无拘束的; 不受控制的; 未加制止的: unrestrainedanger, temper, violence, etc 未受控制的愤怒、 脾气、 暴力等 * the unrestrained use of military force 对军队的滥用.
unripe
/ 9Qn5raIp; Qn`raIp/ adj not yet ripe 未成熟的:,unripe ba`nanas 未熟的香蕉.
unrivalled (US unrivaled) 
/ Qn5raIvld; Qn`raIvld/ adj ~ (in sth) having no rival; unequalled 无对手的; 无双的: have an unrivalled reputation 无与伦比的声誉 * unrivalled in courage 英勇无比.
unroll
/ 9Qn5rEUl; Qn`rol/ v [I, Tn] (cause sth to) open out from a rolled position by rolling （使某物）（由卷曲状态）展开: unroll a carpet, map, sleeping-bag 把卷著的地毯、 地图、 睡袋展开. Cf 参看 roll2 3.
unruffled
/ 9Qn5rQfld; Qn`rQfld/ adj not upset or agitated; imperturbable 平静的; 镇定的; 沉著的: She spoke with unruffled calm. 她从容不迫地讲话. * He remained unruffled by the charges. 他受到这些指控仍处之泰然.
unruly
/ Qn5ru:lI; Qn`rulI/ adj not easy to control or discipline; disorderly 不易控制或管教的; 不守规矩的: unruly behaviour 不守规矩的行为 * an unruly mob, crowd, demonstration, etc 难以控制的暴民、 群众、 示威集会等 * (fig 比喻) unruly hair, ie hard to manage 难以梳理的乱发. 
unruliness 
n [U].
UNRWA
/ 5QnrE; `QnrE/ abbr 缩写 = United Nations Relief and Works Agency 联合国难民救济及工程处.
unsaid
/ 9Qn5sed; Qn`sZd/ adj (fml 文)  1 [pred 作表语] not expressed; unspoken 未表达; 未说出: Some things are better left unsaid. 有些事情还是不说出来为好.  2 pt, pp of unsay.
unsaturated
/ Qn5sAtFEreItId; Qn`sAtFE9retId/ adj  1 not saturated 未浸透的; 未充满的.  2 (chemistry 化) (esp of an organic compound) that can combine with hydrogen, to form a third substance by the joining of molecules （尤指有机化合物）不饱和的, 未饱和的. Cf 参看 polyunsaturated.
unsavoury (US unsavory) 
/ 9Qn5seIvErI; Qn`sevErI/ adj  1 unpleasant to the taste or smell; disgusting 味道不好的; 气味难闻的; 令人厌恶的: an unsavoury mixture of cold pasta and curry 难吃的冷的意大利面食和咖喱食品.  2 (fml or joc 文或谑) morally unpleasant or offensive; disreputable （道德上）令人不快或厌恶的; 声名狼藉的: unsavoury rumours, details, habits 令人厌恶的谣言、 细节、 习惯 * an unsavoury character, reputation 缺德的人、 坏的名声. Cf 参看 savoury.
unsay
/ 9Qn5seI; Qn`se/ v (pt, pp unsaid / -5sed; -`sZd/) [Tn esp passive 尤用於被动语态] (fml 文) take back (sth that has been said); retract 取消, 收回（说过的话）; 撤回: What is said cannot be unsaid. 话已出口, 无法收回.
unscathed
/ 9Qn5skeITd; Qn`skeTd/ adj [pred 作表语] not injured or hurt; unharmed 未受损伤; 未遭伤害: The hostages emerged from their ordeal unscathed. 人质经受磨难而平安生还.
unscramble
/ 9Qn5skrAmbl; Qn`skrAmbl/ v [Tn]  1 restore (a scrambled message) to a form that can be understood 将（杂乱的信息）加以整理（以便理解）.  2 (infml 口) restore (sth) to order from a confused state 整理或整顿（某事物）: After a few seconds to unscramble my thoughts, I replied... 我稍微整理了一下思路, 然後回答说....
unscrew
/ 9Qn5skru:; Qn`skru/ v (a) [Tn] loosen (a screw, nut, etc) by turning it; unfasten (sth) by removing screws 旋松（螺丝、 螺母等）; 旋下螺丝以松开（某物）: unscrew the door-handle 松开门拉手上的螺丝. (b) [I, Tn] (make sth) come undone by twisting （将某物）拧开: The lid of this jam pot won't unscrew. 这果酱罐的盖子拧不开.
unscripted
/ Qn5skrIptId; Qn`skrIptId/ adj (of a speech, broadcast, etc) made without a prepared script （指讲话、 广播等）无讲稿的: a language course based on natural unscripted dialogues, conversations, etc 以无讲稿的自然对话、 交谈等为基本教学方式的语言课.
unscrupulous
/ Qn5skru:pjUlEs; Qn`skrupjElEs/ adj without moral principles 无道德原则的; 不讲道德的: unscrupulous methods, behaviour 不道德的方法、 行为 * He was utterly unscrupulous in his dealings with rival firms. 他与对立公司竞争完全不讲道德.
unscrupulously 
adv. 
unscrupulousness 
n [U].
unseat
/ 9Qn5si:t; Qn`sit/ v [Tn]  1 throw (sb) off a horse, bicycle, etc 使（某人）从马、 自行车等上摔下.  2 remove (sb) from office, esp from a seat in parliament 免除（某人）的职务; （尤指）罢免（议员）: a move to unseat Labour militants 为罢免工党激进分子而采取的行动.
unseemly
/ Qn5si:mlI; Qn`simlI/ adj (fml 文) (of behaviour,etc) not proper or seemly; unbecoming （指行为等）不适当的, 不适宜的, 不得体的: an unseemly rush to leave work 为赶著下班的喉急相 * make unseemly suggestions 提出不恰当的建议 * His language was most unseemly, ieabusive. 他的话很不得当（出言不逊）. 
unseemliness
n [U].
unseen
/ Qn5si:n; Qn`sin/ adj  1 not seen; invisible 未被看见的; 看不见的: I slipped from the room unseen, ie unnoticed. 我悄悄地溜出房间, 无人察觉.  2 (of a translation) done without previous preparation （指翻译）事先无准备的.  3 (idm 习语) sight unseen => sight1.
unseen 
n (Brit) passage for translation from a foreign language into one's own language without previous preparation 不经准备需译成本族语的一段外文: German unseens 需当场翻译的几段德文.
unserviceable
/ 9Qn5s\:vIsEbl; Qn`s[vIsEbl/ adj (abbrs 缩写 US, u/s) (fml or joc 文或谑) that cannot be used because worn out, broken, etc （因破旧、 损坏等）不能使用的: an unserviceable bicycle, telephone, tin-opener, etc 已不能用的自行车、 电话机、 开罐器等.
unsettle
/ 9Qn5setl; Qn`sZtl/ v [Tn] (a) disturb the normal calm state of (sth/sb); upset 打扰（某事物[某人]）; 使不安宁: Our move (ie to another house) unsettled the children. 我们搬家弄得孩子们不得安宁. * Seafood unsettles my stomach. 我一吃海鲜胃就不舒服. (b) make (sb) uneasy or anxious; disturb 使（某人）不安或担忧; 扰乱: Living alone unsettled his nerves. 他独自生活, 情绪很不稳定.
unsettled 
adj (a) unstable or upset or disturbed 不稳定的; 不安宁的; 扰乱的: Conditions on the stock-market were unsettled. 证券市场的行情不稳定. * anunsettled stomach 胃部不舒服 * feel unsettled in one's newsurroundings 在新的环境里感到不安. (b) changeable or unpredictable 易变的; 多变的; 无法预料的: unsettled weather 变幻莫测的天气 * Our future plans are still unsettled. 我们将来的计画尚难逆料. (c) (of an argument, etc) open to further discussion （指争论等）需进一步讨论的, 未解决的. (d) (of a bill, etc) unpaid （指帐单等）未付款的.
unshakeable
/ Qn5FeIkEbl; Qn`FekEbl/ adj (of a belief, etc) that cannot be changed; absolutely firm （指信仰等）不可改变的, 坚定不移的: an unshakeable conviction, resolve, faith, etc 坚定不移的信念、 决心、 信仰等.
unsightly
/ Qn5saItlI; Qn`saItlI/ adj not pleasant to look at; ugly 难看的; 不雅观的; 丑陋的: unsightly facial hair, eg on women 难看的面部汗毛（如女子的） * London's unsightly suburban sprawl 伦敦郊外不雅观的无计画扩展的地区. 
unsightliness 
n [U].
unskilled
/ 9Qn5skIld; Qn`skIld/ adj not having or requiringspecial skill or training 无特殊技能的; 无需专门训练的: ,unskilled `workers 无特殊技能的工人 * ,unskilled `labour 非技术性的工人.
unsociable
/ Qn5sEUFEbl; Qn`soFEbl/ adj disliking the company of others; not sociable 不好交际的; 不合群的. Cf 参看 antisocial.
unsocial
/ Qn5sEUFl; Qn`soFEl/ adj  1 unsociable 不好交际的; 不合群的.  2 not conforming to standard working times 不符合标准工作时间的: unsocial hours, eg on night shifts 非正常工作时间（如夜班）.
unsolicited
/ 9QnsE5lIsItId; 9QnsE`lIsItId/ adj given or sent voluntarily; not asked for 主动提供或送出的; 未经请求的: ,unsolicited `help, ad`vice, etc 主动给予的帮助、 劝告等 * ,unsolicited `comments, `criticisms, etc 未经徵求而做出的评语、 批评等 * ,unsolicited (junk) `mail, ie usu for advertising purposes 未经索要而寄来的（杂类）邮件（通常为宣传品）.
unsophisticated
/ 9QnsE5fIstIkeItId; 9QnsE`fIstI9ketId/ adj (sometimes derog 有时作贬义)  1 simple and natural 简单而自然的: unsophisticated tastes, attitudes, looks 简单的爱好、 憨直的态度、 自然的神情 * To the unsophisticated(ie naive) mind of the average viewer... 对於一般观众的单纯心理....  2 not complex or refined; basic 不复杂的; 不精细的; 基本的: unsophisticated tools, methods, designs 简单的工具、 方法、 设计.
unsound
/ 9Qn5saUnd; Qn`saJnd/ adj  1 in poor condition; weak 不健全的; 情况不佳的; 虚弱的: The house roof was (structurally) unsound. 这屋顶（结构）不牢固. * His lungs were unsound. 他的肺部不健康.  2 not free from defects or mistakes; flawed 有缺点的; 有错误的; 有缺陷的; 有瑕疵的: unsound reasoning, judgement, advice 不当的推理、 判断、 劝告 * The findings of the research seem unsound. 研究的结果似乎不确.  3 (idm 习语) of ,unsound `mind (law 律) insane 精神错乱的.
unsparing
/ Qn5speErIN; Qn`spZrIN/ adj ~ (in sth)  1giving freely and generously 慷慨的; 大方的: be unsparingin one's efforts 不遗余力.  2 severe or merciless 严厉的; 不留情的: Nijinsky was unsparing in his demands for perfection. 尼任斯基对演技精益求精一丝不苟.
unsparingly 
adv  1 generously 慷慨地; 大方地: give unsparingly of one's time and money 舍得花时间和金钱.  2 mercilessly 无情地; 残忍地: He drove himself unsparingly. 他强迫自己拚命干.
unspeakable
/ Qn5spi:kEbl; Qn`spikEbl/ adj (usuderog 通常作贬义) that cannot be expressed in words; indescribable 不能以言语表达的; 难以言传的; 无法形容的: unspeakable cruelty, behaviour, embarrassment 难以形容的残忍、 行为、 尴尬 * unspeakable joy, delight, etc 说不出的快乐、 喜悦等. 
unspeakably 
/ -EblI;-EblI/ adv: an unspeakably vile habit 不可言状的坏习惯.
unstable
/ 9Qn5steIbl; Qn`stebl/ adj  1 likely to move or fall; not firm 很可能移动或跌落的; 不稳的; 不坚固的: an unstable load, eg on a lorry 装得不稳的货物（如卡车上的） * an unstable pile of chairs 一堆放得不牢靠的椅子.  2 likely to change suddenly; unpredictable 很可能突然改变的; 难以预料的: unstable share prices 变化莫测的股票价格 * The political situation is highly unstable.政局动荡得很厉害.  3 mentally or emotionally unbalanced（精神或情绪）不平衡的, 波动的: His personality is a little unstable. 他这个人有点反覆无常.
unsteady
/ 9Qn5stedI; Qn`stZdI/ adj (-ier, -iest)  1 not firm or secure 不坚固的; 不牢靠的; 不稳的: Six whiskies made him unsteady on his feet. 他喝了六杯威士忌就脚下不稳了. * an unsteady hand, voice 颤抖的手、 声音 * have an unsteady footing on the ladder 在梯子上站得不稳.  2 not uniform or regular 不一贯的; 不一致的; 不规则的: the candle's unsteady flame 蜡烛的闪烁不定的火焰 * His heartbeat/pulse was unsteady. 他的心跳[脉搏]不规则. 
unsteadily 
/ -IlI; -IlI/ adv: wobble, tilt, rock, sway, etc unsteadily 不稳定地摆动、 倾倒、 摇动、 摇摆等. 
unsteadiness 
n [U].
unstinting
/ Qn5stIntIN; Qn`stIntIN/ adj ~ (in sth) giving freely and generously 慷慨的; 大方的: unstinting generosity,support, praise 无比的慷慨、 大力的支持、 高度的赞扬 * She was unstinting in her efforts to help. 她不遗余力地提供援助.
unstintingly 
adj.
unstop
/ 9Qn5stCp; Qn`stBp/ v (-pp-) [Tn] remove a blockage from (a waste-pipe) 除去（污水管）的障碍: unstop a sink, toilet, drain, etc 疏通洗涤槽、 抽水马桶、 下水道等.
unstoppable
/ Qn5stCpEbl; Qn`stBpEbl/ adj (esp infml 尤作口语) that cannot be stopped or prevented 无法停止的; 不能防止的: The Tories in their third term will be unstoppable. 保守党势必接连第三届执政.
unstuck
/ 9Qn5stQk; Qn`stQk/ adj  1 not stuck or glued on or together; detached 未粘住的; 未附著的; 松开的: The (flap of the) envelope was unstuck. 信封（的封口）没粘住.  2 (idm 习语) ,come un`stuck (infml 口) be unsuccessful; fail 不成功; 失败: His plan to escape came badly unstuck. 他想逃走的打算完全吹了.
unstudied
/ 9Qn5stQdId; Qn`stQdId/ adj natural and unaffected 自然而不做作的: with ,unstudied `elegance, `grace, `charm, etc 以自然的文雅、 优雅、 魅力等.
unsung
/ 9Qn5sQN; Qn`sQN/ adj (fml 文) not celebrated in poetry or song; unrecognized （在诗或歌中）未赞颂的; 未获承认的: ,unsung `heroes 未受到颂扬的英雄 * His exploits went unsung. 他的英勇行为无人赏识.
unsure
/ 9Qn5FR:(r); ?@ -5FUEr; Qn`FJr/ adj [pred 作表语]  1 ~ (of oneself) having little self-confidence 缺乏自信心: He's rather unsure of himself. 他对自己没有什麽信心.  2 ~ (about/of sth) not having certain knowledge (about sth) （对某事）不确知, 无把握: I'm unsure of the facts. 我不能肯定事实是否如此. * We were unsure (about) who was to blame. 我们说不清该责怪谁.
unsuspecting
/ 9QnsE5spektIN; 9QnsE`spZktIN/ adj feelingno suspicion; trusting 不坏疑的; 无猜疑的; 可信任的: The murderer crept up on his unsuspecting victim. 那个杀人凶手悄悄逼近毫无戒备之心的受害者.
unswerving
/ Qn5sw\:vIN; Qn`sw[vIN/ adj ~ (in sth) steady or constant; unchanging 坚定的; 不改变的: unswerving loyalty, devotion, belief, etc 始终不渝的忠诚、 奉献、 信念等 * He is unswerving in pursuit of his aims. 他坚定地追求自己的目标.
untangle
/ 9Qn5tANgl; Qn`tAN^l/ v [Tn, Tn.pr] free (sth) from knots, complexities, etc 解开（某物）的结; 使不再打结、 不再紊乱等: untangle knitting wool, electric flex 解开缠结的毛线、 电线 * She untangled her hair from the hair-drier. 她把搅在吹风机上的头发松开了. * (fig 比喻) untangle a plot 理出头绪 * I can't untangle these accounts/figures. 我算不清这些帐目[数字].
untapped
/ 9Qn5tApt; Qn`tApt/ adj not yet used or exploited未使用的; 未开发的: an untapped source of wealth, talent, inspiration 未利用的财源、 聪明才智、 灵感 * draw on untapped reserves of strength 动用未曾用过的後备力量.
untenable
/ 9Qn5tenEbl; Qn`tZnEbl/ adj (of a theory, etc) that cannot be defended （指理论等）站不住脚的, 不堪一击的: untenable arguments, claims, propositions, etc 站不住脚的论据、 要求、 主张等 * the untenable position of the Flat Earth Society ｀地球平面说学会＇的不堪一击的立论.
unthinkable
/ 9Qn5WINkEbl; Qn`WINkEbl/ adj too unlikely or undesirable to be considered; inconceivable （因绝少可能或极不可取）不必考虑的; 难以想像的; 不可思议的: It is unthinkable that we should allow a nuclear holocaust to occur. 我们若竟让核武器大屠杀的惨剧发生, 简直是匪夷所思.
unthinking
/ 9Qn5WINkIN; Qn`WINkIN/ adj said, done, etc without proper consideration; thoughtless 考虑不周的; 未经思考的: unthinking remarks, criticisms 失慎的言语、 批评 * Unthinking, he threw his lighted match into the waste-paper basket. 他想也没想就把燃著的火柴扔进了废纸篓里了.
unthinkingly 
adv.
untidy
/ Qn5taIdI; Qn`taIdI/ adj (-ier, -iest) not neat or orderly 不整齐的; 凌乱的: an untidy desk, kitchen, cupboard, etc 凌乱的书桌、 厨房、 橱柜等 * untidy hair,writing 蓬乱的头发、 潦草的字迹 * He's an untidy worker; he leaves his tools everywhere. 他干活儿毫无条理, 工具随处乱扔. 
untidily 
/ -IlI; -IlI/ adv. 
untidiness 
n [U].
until
/ En5tIl; En`tIl/ (also till) (till more informal; until usu preferred in initial position *till多用於口语; until通常用於句首) conj up to the time when 直到...时（为止）: Wait until the rain stops. 等到雨停了再说吧. * Don't leave till I arrive. 我不来你不要离开. * Continue in this direction until you see a sign. 一直朝著这个方向走就看见指示牌了. * Until she spoke I hadn't realized she was foreign. 她要不说话我还一直不知道她是外国人. * I won't stop shouting until you let me go. 你不放我走我就一直喊叫. * No names are being released until (ie before) the relatives have been told. 只有在通知这些人的亲属以後才可透露其姓名.
until (also till) 
prep (a) up to (a specified time) 直到（某一时刻）: wait until tomorrow 等到明天 * It maylast till Friday. 这可能要延续到星期五. * Nothing happeneduntil (ie before) 5 o'clock. 五点钟以前没有出现任何迹象. * The street is full of traffic from morning till night. 这条街从早到晚行人车辆很多. * Until now I have always lived alone. 我一直独自生活至今. * I'd like to stay here up until Christmas. 我想在这儿呆到圣诞节. (b) up to the time of (a specified event) 直到（发生某事）: The secret was never told until after the old man's death. 这个秘密在老人去世後才说出来. * Don't open it till your birthday. 等到你过生日那天再打开. * She was a bank clerk until the war, when she trained as a nurse. 她战前是个银行职员, 战时受训当了护士.
untimely
/ Qn5taImlI; Qn`taImlI/ adj  1 happening at an unsuitable time 不适时的; 不合时宜的: an untimely arrival, remark, intervention 不合时宜的到达、 言语、 干涉.  2 happening too soon or sooner than normal 过早的; 比正常情况早的: her untimely death at 25 她25岁时英年早逝. 
untimeliness 
n [U].
untiring
/ Qn5taIErIN; Qn`taIrIN/ adj ~ (in sth) (approv 褒) continuing to work, etc at the same rate without showing tiredness 不知疲倦的; 坚持不懈的: untiring campaigners for peace 为争取和平不懈努力的人 * She is untiring in her efforts to help the homeless. 她帮助无家可归的人从不言倦. 
untiringly 
adv.
untold
/ 9Qn5tEUld; Qn`told/ adj  1 not told 未说过的; 未叙述过的; 未透露的: Her secret remains untold to this day. 她的秘密至今仍未透露.  2 [attrib 作定语] (esp derog 尤作贬义) too many or too much to be counted, measured, etc 多得数不清或算不清的; 无数的; 无限的: ,untold `suffering, `damage, `cruelty 罄竹难书的苦难、 损害、 残忍 * a man of ,untold `wealth 腰缠万贯的男子 *,untold `thousands, `millions, etc, ie of pounds 数不清的以千、 百万等计的（英镑）.
untouchable
/ Qn5tQtFEbl; Qn`tQtFEbl/ n, adj (in India) (member) of a Hindu social class (caste) whose touch is regarded as defiling to other higher classes （印度的）不可接触的, 不可接触者（种姓制度中最低层的人）.
untoward
/ 9QntE5wR:d; ?@ Qn5tR:rd; Qn`tRrd/ adj (fml 文) inconvenient or unfortunate; awkward 不便的; 不幸的; 造成困难的: untoward incidents, developments, discoveries 不妙的事情、 变化状况、 发现 * I'll come if nothing untoward happens. 我要是没有特殊情况一定来.
untrammelled (US also untrammeled) 
/ Qn5trAmld; Qn`trAmld/ adj (fml 文) not hampered 不受阻碍的; 不受束缚的: a life untrammelled by responsibilities 无责任而一身轻的生活.
untried
/ 9Qn5traId; Qn`traId/ adj not yet tried or tested 未曾尝试的; 未经试验或检验的: ,untried `products, `systems, `methods 未经检验的产品、 装置、方法.
untrue
/ 9Qn5tru:; Qn`tru/ adj  1 not true; contrary to fact 不真实的; 违反事实的; 假的.  2 ~ (to sb/sth) (fml 文) not loyal 不忠诚的; 不忠实的: She was untrue (ie unfaithful) to him. 她对他不忠实.
untruth
/ 9Qn5tru:W; Qn`truW/ n  1 [C] (pl ~s / -5tru:Tz;-`truTz/) (fml euph 文, 婉) untrue statement; lie 谎言; 假话: tell patent (ie obvious) untruths 显然说谎.  2 [U] lack of truth 不真实; 虚假. 
untruthful 
/ Qn5tru:Wfl; Qn`truWfEl/ adj. 
untruthfully 
/ -fElI; -fElI/ adv.
unturned
/ 9Qn5t\:nd; Qn`t[nd/ adj (idm 习语) leave no stone unturned => leave1.
untutored
/ 9Qn5tju:tEd; ?@ -5tu:-; Qn`tutLd/ adj (fml or joc 文或谑) untaught or untrained; unsophisticated 未受教导的; 未经训练的; 简单而自然的: To my untutored ear, your voice sounds almost professional. 照我这外行人听来, 你的嗓音差不多够专业水平了.
unused
/ 9Qn5ju:zd; Qn`juzd/ adj never having been used 未曾使用过的: an unused envelope, postage stamp 未用过的信封、 邮票.
unused
/ 9Qn5ju:st; Qn`just/ adj [pred 作表语] ~ to sth/sb unaccustomed to or unfamiliar with (sth/sb) 不习惯; 不熟悉: The children are unused to city life/to living in a city. 这些孩子不习惯城市生活.
unusual
/ Qn5ju:Vl; Qn`juVEl/ adj  1 rare or exceptional 罕有的; 异乎寻常的: This bird is an unusual winter visitor to Britain. 这种鸟很少冬季到英国来. * It's unusual for him to refuse a drink. 给他酒他不喝, 这事可新鲜.  2 (esp approv 尤作褒义) remarkable because different; distinctive 独特的; 与众不同的: The Lloyds building is nothing if not (ie is very) unusual. 劳埃德大楼别具一格.
unusually 
/ -VElI; -VElI/ adv exceptionally or extremely 异常地; 极端地: an unusually high rainfall for January 一月份异常高的降雨量 * Unusually for him, he wore a tie. 他系了一条领带, 这可真少见.
unutterable
/ Qn5QtErEbl; Qn`QtErEbl/ adj [attrib 作定语] (fml 文) too great, intense, etc to be expressed in words （因过大、 过强烈等）无法用言语表达的: unutterable pain, delight, boredom, relief, etc 不可言状的痛苦、 欢愉、 厌倦、 宽慰等 * He's an unutterable bore. 他这个人讨厌透了. 
unutterably 
/ -EblI; -EblI/ adv: unutterably foolish 愚蠢透顶.
unvarnished
/ Qn5vB:nIFt; Qn`vBrnIFt/ adj [attrib 作定语]  1 not varnished 未涂清漆的.  2 (fig 比喻) (of a statement, etc) basic or straightforward （指陈述等）不加修饰的, 基本的, 直率的: the plain unvarnished truth 直言无隐的实情 * give an unvarnished account of what happened 如实叙述发生的事.
unveil
/ 9Qn5veIl; Qn`vel/ v  1 [I, Tn] remove one's veil; remove a veil from (sth/sb) 除去面纱; 揭去（某物[某人]）的面纱或遮盖物.  2 [Tn] (a) remove a cloth, etc from (sth), esp as part of a public ceremony 除去（某物）的幕布等; （尤指）为（某事物）揭幕: unveil a statue, monument, plaque, portrait, etc 揭去雕像、 纪念碑、 牌匾、 肖像等的幕布. (b) show or announce (sth) publiclyfor the first time 首次公开、 揭露或展示（某事物）: unveilnew models at the Motor Show 在汽车展览会上首次展出若干新型汽车 * She unveiled her plans for reform. 她首次公开了她的改革计画.
unversed
/ 9Qn5v\:st; Qn`v[st/ adj ~ in sth (fml 文) not experienced or skilled in sth 无经验的; 无技能的; 不熟练的: foreigners unversed in the British way of life不熟悉英国生活方式的外国人 * unversed in social etiquette 不谙社交礼仪.
unvoiced
/ 9Qn5vRIst; Qn`vRIst/ adj (of thoughts, etc) not expressed or uttered （指想法等）未表达的, 未说出的: an ,unvoiced `protest, `doubt, suspicion 内心的抗议、 疑问、 怀疑.
unwaged
/ 9Qn5weIdVd; Qn`wedVd/ adj (Brit euph 婉) having no regular paid employment 无工资收入的; 无固定报酬的: Unwaged members pay a lower entrance fee. 无固定收入的人入场费从优.
the unwaged 
n [pl v]: half-price tickets for the unwaged （无工资收入者用的）半价票.
unwanted
/ 9Qn5wCntId; Qn`wBntId/ adj not wanted 不想要的; 无人要的; 不该有的: an ,unwanted `pregnancy 不希望有的怀孕 * feel unwanted 觉得成为多余者.
unwarrantable
/ Qn5wCrEntEbl; ?@ -5wR:r-; Qn`wRrEntEbl/ adj (fml 文) unjustifiable 无正当理由的; 无法证明为正当的: Their intrusion into our private lives is unwarrantable. 他们侵扰我们的私生活是毫无道理的.
unwarranted 
/ Qn5wCrEntId; ?@ -5wR:r-; Qn`wRrEntId/ adj unjustified or unauthorized 未证实为正当的; 未经授权的: unwarranted fears, doubts, misgivings, etc 不合情理的恐惧、 怀疑、 担忧等.
unwary
/ Qn5weErI; Qn`wZrI/ adj not cautious or aware of possible danger, etc; not vigilant 无警惕的; 不警觉的: Pot-holes can be lethal for the unwary cyclist. 路上的坑坑洼洼骑车的人一不小心就有致命危险.
the unwary 
n [pl v]: Small print in documents can contain traps for the unwary. 文件中的小号印刷字体可能藏有给粗心人设下的陷阱. 
unwarily 
/ -IlI; -IlI/ adv. 
unwariness 
n [U].
unwholesome
/ 9Qn5hEUlsEm; Qn`holsEm/ adj  1 harmful to health or to moral well-being 不卫生的; 有害身心健康的: an unwholesome climate 有害健康的气候 * unwholesome food 不卫生的食物 * unwholesome reading for a child 对儿童身心健康有害的读物.  2 unhealthy-looking 看上去不健康的: an unwholesome complexion 不健康的面色.
unwieldy
/ Qn5wi:ldI; Qn`wildI/ adj awkward to move or control because of its shape, size or weight （因形状、 大小或重量的关系）不便移动或操纵的, 笨拙的, 不灵便的: long, unwieldy punt poles 长的、 使用不便的撑船篙* (fig 比喻) the unwieldy bureaucracy of centralized government 中央集权政府动转不灵的官僚体制. 
unwieldiness 
n [U].
unwilling
/ Qn5wIlIN; Qn`wIlIN/ adj not willing or inclinedto do sth; reluctant 不愿意的; 不情愿的; 勉强的: unwillingvolunteers, victims, accomplices 迫不得已的志愿者、 牺牲者、 从犯 * my unwilling participation in the scheme 我不得已参加这个计画 * I was unwilling to co-operate without having more information. 我不想在了解不足的情况下参与合作. 
unwillingly 
adv: agree unwillingly to a request 勉强答应一个要求.
unwind
/ 9Qn5waInd; Qn`waInd/ v (pt, pp unwound /- 5waUnd; -`waJnd/)  1 [I, Tn, Tn.pr] ~ sth (from sth) (cause sth to) become drawn out from a roll, ball, etc （使某物）从卷状或团状等展开; 解开（卷绕之物）: unwind a ball of string, a reel of thread, a roll of bandage, etc 解开一团细绳、 一卷线、 一卷　带等 * He unwound the scarf from his neck. 他从脖子上解下围巾.  2 [I] (infml 口) relax after a period of work or tension （工作或紧张之後）放松, 松弛: Reading is a good way to unwind. 阅读是休息的好方式. * After a few drinks, he began to unwind, ie to talk more freely. 他喝了几杯酒, 话就多起来了.
unwise
/ 9Qn5waIz; Qn`waIz/ adj not wise; foolish 不聪明的; 不明智的; 愚蠢的: an ,unwise de`cision, `move, `step, etc 不智的决定、 行动、 步骤等 * It was unwise (of you) to reject his offer. （你）回绝他的好意, 这事办的可不聪明.
unwisely 
adv.
unwitting
/ Qn5wItIN; Qn`wItIN/ adj [attrib 作定语] (fml 文)  1 not knowing or aware 不知道的; 未察觉的; 未意识到的: an unwitting carrier of stolen goods 不知就里而携赃物的人.  2 not intentional 无意的; 非故意的; 不知不觉的: my unwitting interruption of their private conversation我无意中打断他们的私下谈话. 
unwittingly 
adv: If I offended you it was unwittingly. 要是我冒犯了您, 也是无心之失.
unwonted
/ Qn5wEUntId; Qn`wontId/ adj (fml 文) not customary or usual 非惯常的; 不寻常的; 异常的; 罕见的: an unwonted intrusion, interruption 异乎寻常的闯入、 打扰.
unworkable
/ 9Qn5w\:kEbl; Qn`w[kEbl/ adj not practicalor feasible 不实用的; 不可行的; 行不通的: an unworkableplan, proposal, scheme, etc 不切实际的计画、 建议、 方案等.
unworldly
/ 9Qn5w\:ldlI; Qn`w[ldlI/ adj spiritually-minded; not worldly 著重精神生活的; 非世俗的; 非尘世的; 超凡的: an unworldly man, outlook, idealism 超凡脱俗的男子、 观点、 理想主义. 
unworldliness 
n [U].
unworthy
/ Qn5w\:TI; Qn`w[TI/ adj  1 lacking worth or merit 无价值的; 没有优点的: fighting for an unworthycause 为不值得的事而争斗.  2 ~ (of sth) not deserving不值得的; 不应得的: trivia unworthy of your attention 不值得您费心的琐事 * I am unworthy of such an honour. 我不配获得这样的荣誉.  3 ~ (of sb/sth) not befitting the character of sb/sth 不适宜的; 不相称的: conduct unworthy of a decent citizen 正直的公民不应有的行为. 
unworthily 
/ -IlI; -IlI/ adv. 
unworthiness 
n [U].
unwound
pt, pp of unwind.
unwritten
/ 9Qn5rItn; Qn`rItn/ adj not written down 未写下的; 不成文的. an unwritten law/`rule  law/rule that is based on custom and practice, but is not written down 不成文法[规定].
unyielding
/ Qn5ji:ldIN; Qn`jildIN/ adj ~ (in sth) not giving way to pressure or influence, etc; firm （在压力和影响下）不弯曲或不让步的; 坚固的: The mattress was hard and unyielding. 这床垫很硬, 没有弹性. * (fig 比喻) unyielding in her opposition to the plan 她对该计划之坚决反对.
fed up
/ 9fed 5Qp; 9fZd `Qp/ adj [pred 作表语] ~ (about/with sb/sth) (infml 口) tired or bored; unhappy or depressed 厌倦; 厌烦; 不愉快; 沮丧: What's the matter? You look pretty fed up. 怎麽啦? 你显得那麽不高兴. * I'm fed up with waiting for her to telephone. 我等她的电话都等得不耐烦了.
pent up
/ 9pent 5Qp; `pZnt`Qp/ adj (of feelings) not expressed; repressed （指感情）不流露的, 被抑制的: feelings that have been pent up for too long 岩止玫母星� * ,pent-up `anger, emotion, frustration, etc 郁结的愤懑、 情感、 沮丧等.
up
/ Qp; Qp/ adv part (For special uses with many vs, eg pick sth up, wind sth up, screw sth up, see the v entries 可与许多动词连用, 如pick sth up、 wind sth up、 screw sth up, 其释义见各动词词条.)  1 (a) to or in an upright position (esp one suggesting readiness for activity) 趋於或处於直立的姿势或位置（尤含准备活动之意）: I stood up to ask a question. 我站起来提一个问题. * He jumped up (ie to a standing position) from his chair. 他突然从椅子上站了起来. Cf 参看 down1 1. (b) not in bed 不在床上: Is Peter up (ie Has he got out of bed) yet? 彼得起床了吗? * I was up late (ie didn't go to bed until late) last night. 我昨天很晚才睡. * It's time to get up! 该起床了! * I was up all night with a sick child. 我陪伴著生病的孩子彻夜未眠.  2 to or in a higher place, position, condition, degree, etc 趋於或处於较高的地方、 位置、 条件、 程度等: Lift your head up. 把头抬起来. * Pull your socks up. 加把劲儿. * He lives three floors up. 他住在往上数第三层楼. * Prices are still going up, ie rising. 物价仍在上涨. * Put the packet up on the top shelf. 把这个包放到架子顶格上去. * The sun was coming up (ie rising) as we left. 我们离开时, 太阳正在升起. * We were two goals up (ie ahead of the other team) at half-time. 我们在上半场赢了（领先於对方）两个球. Cf 参看 down1 2.  3 ~ (to sb/sth) so as to be close (to a specified person or thing) 靠近（某人或某物）: He came up (to me) and asked the time. 他走到我跟前问我什麽时间了. * She went straight up to the door and knocked loudly. 她径直走到门口重重地敲门. * A car drove up and he got in. 一辆汽车开来, 他上了车.  4 (a) to or in an important place (esp a large city) 朝著重要地方或在重要地方（尤指大城市）: go up to London for the day 今天上伦敦去 * They're up in London. 他们在伦敦. * [attrib 作定语] The up train (ie The train to London) leaves every hour. 上行火车（开往伦敦的火车）每小时一班. (b) (Brit) to or in a university (esp Oxford or Cambridge) 朝著大学或在大学（尤指牛津或剑桥）: She is going up to Oxford in October. 她在十月份要上牛津大学. * He's up at Cambridge. 他在剑桥大学. (c) to or 
up 
prep  1 to or in a higher position on (sth) 向著或在（某物）的较高处: run up the stairs 跑上楼 * further up the valley 向山谷高处 * walk up (ie along) the road 沿著路走 * sail up a river, ie against the current 向上游航行（逆流行驶）.  2 (idm 习语) up and down sth backwards and forwards on sth 在某物上面来来去去: walking up and down the platform 在站台上走来走去. ,up `yours! (Brit <!> sl 讳, 俚) (used to express extreme anger, disgust, annoyance, etc towards a person 用以表示对某人极端愤怒、 厌恶、 气恼等).
up 
v (-pp-)  1 [I] (infml or joc 口或谑) (followed by and and another v 後接and及另一动词) get or jump up; rouse oneself 起来; 跳起; 奋起: She upped and leftwithout a word. 她一言不发站起来就走了.  2 [Tn] (infml口) increase (sth) 增加（某事物）: up the price 涨价 * up an offer 提高出价.  3 (idm 习语) ,up `sticks move with all one's possessions to live and work in another place 携全部财产迁往另一处生活和工作.
up 
n  1 [sing] part of a ball's path in which it is still moving upwards after bouncing on the ground （球著地後的）弹起: Try to hit the ball on the up. 要在球弹起时击球.  2 (idm 习语) ,ups and `downs alternate good and bad luck 幸运与不幸的交替: He stuck by her through all life's ups and downs. 他对她始终不渝, 同甘共苦.
up-and-coming 
adj (infml 口) (of a person) making good progress; likely to succeed (esp in a career) （指人）进步很大的, 很可能成功的（尤指在事业上）: an ,up-and-coming young `barrister 年轻有为的讼务律师.
up-
pref 前缀 (with ns, vs and their related forms 与名词、 动词及其相关形式结合) higher 更高: upheaval * upland * upgrade.
up-country
/ 9Qp5kQntrI; `Qp`kQntrI/ adj, adv (esp in large thinly-populated countries) in or towards the interior （尤指地广人稀的地区）在内地（的）, 向内地（的）: ,up-country `districts 内陆区域 * travel up-country 往内地之行.
up-end
/ 9Qp5end; Qp`Znd/ v [I, Tn] rise or set (sth) up on its end 上下颠倒著放（某物）; 使（某物）倒立: I up-ended the crate and sat on it. 我把板条箱倒过来坐.
up-market
/ 9Qp5mB:kIt; 9Qp`mBrkEt/ adj (of products, services, etc) designed to appeal to or satisfy people in the upper social classes （指商品、 服务等）高级的, 高档的. Cf 参看 down-market.
up-to-date
/ 9Qp tE 5deIt; `QptE`det/ adj [attrib 作定语]1 modern or fashionable 现代的; 新式的: ,up-to-date `clothes, ideas, `books 新潮衣物、 新思想、 最新图书.  2 having or including the most recent information 包含最新信息的: an ,up-to-date `dictionary, report 最新的词典、 报告.
up-to-the-minute
/ 9Qp tE TE 5mInIt; 9QptETE`mInIt/ adj [attrib 作定语]  1 very modern or fashionable; very up-to-date 最现代化的; 最新式的.  2 having or including the most recent information possible 包含最新信息的: an ,up-to-the-minute account of the `riots 关於骚乱的最新报道.
upbeat
/ 5Qpbi:t; `Qp9bit/ n (music 音) unaccented beat, esp at the end of a bar, shown by the conductor's baton moving upwards 上拍; 弱拍. Cf 参看 downbeat.
upbeat 
adj (fig 比喻) optimistic or cheerful 乐观的; 快乐的.
upbraid
/ 9Qp5breId; Qp`bred/ v [Tn, Tn.pr] ~ sb (for sth) (dated or fml 旧或文) scold or reproach sb 责骂或申责某人: upbraid sb for wrongdoing, incompetence, etc 申斥某人干了坏事、 不称职等.
upbringing
/ 5QpbrININ; `Qp9brININ/ n (usu sing 通常作单数) treatment and education during childhood 儿童期的教养; 抚育; 养育: a strict religious upbringing 幼年时严格的宗教教育 * The twins had different upbringings. 这一对孪生儿幼时受的教育不同. * Her country upbringing explains her love of nature. 她是在乡村长大的, 所以非常热爱大自然.
update
/ 9Qp5deIt; Qp`det/ v  1 [Tn] bring (sth) up to date; modernize 更新（某事物）; 使现代化: update a dictionary, file, law 修订词典、 档案、 法律 * update production methods, computer systems 更新生产方法、 计算机设备.  2 [Tn, Tn.pr] ~ sb (on sth) give sb the latest information (about sth) 向某人提供最新信息: I updated the committee on our progress. 我向委员会报告了我们的进展情况.
update 
/ 5QpdeIt; `Qpdet/ n act of updating 更新; 现代化; 提供最新信息: Maps need regular updates. 地图需要经常修订. * an update on the political situation 对政局新的认识.
upgrade
/ 9Qp5greId; 9Qp`^red/ v [Tn, Tn.pr] ~ sb/sth (to sb/sth) raise sb/sth to a higher grade or rank 提高某人[某事物]的级别或等级: She was upgraded to (the post of) sales director. 她已提升为销售部主任. * The consulate was upgraded to embassy status. 该领事馆已升格为大使馆. Cf 参看 downgrade.
upgrade 
/ 5QpgreId; `Qp9^red/ n (US) upward slope 向上的斜坡.
upheaval
/ Qp5hi:vl; Qp`hivl/ n (a) sudden violent upwardmovement （突然而猛烈的）向上的运动: volcanic upheavals 火山的爆发. (b) (fig 比喻) sudden violent change or disturbance 激变; 剧变; 动乱: political, social upheavals 政治的、 社会的动乱 * Moving house causes such an upheaval. 搬家引起了这麽大的变化.
uphill
/ 9Qp5hIl; `Qp`hIl/ adj  1 sloping upwards; ascending 上坡的; 向上的: an ,uphill `road, `climb 上坡路、 向上的攀登 * The last mile is all uphill. 最後一英里全是上坡路.  2 [attrib 作定语] (fig 比喻) needing effort; difficult 费力的; 艰难的: It's uphill work learning to ride. 学骑马是件难事. * an ,uphill `task/`struggle 艰巨的任务[斗争].
uphill 
adv up a slope 上坡: walk uphill 走上坡路.
uphold
/ 9Qp5hEUld; Qp`hold/ v (pt, pp upheld / -5held;-`hZld/) [Tn]  1 support (a decision, etc) against attack 维护, 支持（决定等）: uphold a verdict, policy, principle 支持某项裁决、 政策、 原则.  2 maintain (a custom, etc) 维持, 保持（习俗等）: uphold ancient traditions 保持古老的传统.
upholster
/ 9Qp5hEUlstE(r); Qp`holstL/ v [Tn, Tn.pr] ~ sth (in/with sth) provide (an armchair, etc) with padding, springs, fabric covering, etc 给（单座沙发等）装上垫子、 弹簧、 布面等: upholster a sofa in leather 给长沙发装上皮革面 * upholstered in/with velvet 装上天鹅绒面的.
upholsterer 
/ -stErE(r); -stErL/ n person whose trade is to upholster furniture 家具装饰用品商.
upholstery 
/ -stErI; -stErI/ n [U]  1 trade of an upholsterer 家具装饰用品业.  2 materials used in this trade 家具装饰材料.
UPI
/ 9ju: pi: 5aI; 9ju pi `aI/ abbr 缩写 = United Press International 合众国际社.
upkeep
/ 5Qpki:p; `Qp9kip/ n [U] (cost or means of) keeping sth in good condition and repair; maintenance 保养; 维修; 养护; 维护费; 维修方法: I can't afford the upkeep of a large house and garden. 我负担不起带花园的大房子的维护费.
upland
/ 5QplEnd; `QplEnd/ n (often pl 常作复数) higher or inland parts of a country （一国的）高地, 内陆地区: the barren upland(s) of central Spain 西班牙中部的贫瘠高地 * [attrib 作定语] an upland region 高地区域.
uplift
/ 9Qp5lIft; Qp`lIft/ v [Tn] (usu fig 通常作比喻) raise (sb/sth), esp spiritually, morally or emotionally 提高、 抬高或鼓舞（某人[某事物]）（尤指在精神、 道德或情绪方面）: with uplifted hands 双手高举著 * an uplifting sermon 鼓动人心的讲道.
uplift 
/ 5QplIft; `Qp9lIft/ n [U] spiritual, moral or emotionally elevating influence （精神、 道德或情绪方面的）振作、 振奋或提高: Her encouragement gave me a great sense of uplift. 她鼓励我激发了我的上进心.
upon
/ E5pCn; E`pBn/ prep  1 (fml 文) = on2 1, 4b, 9, 10, 13.  2 (idm 习语) once upon a time => once. (almost) u`pon him, them, us, etc (of a time in the future) rapidly approaching （指将来的某一时刻）迅速接近: Christmas is almost upon us again. 圣诞节又快到了.
upper
/ 5QpE(r); `QpL/ adj [attrib 作定语]  1 higher in place or position; situated above another (esp similar) part （位置或地位）较高的; 位於另一（尤指相似的）部分之上的: the upper lip, arm, jaw 上唇、 上臂、 上颌 * one of the upper rooms, floors, windows 楼上的一个房间、 上面的一层楼、 上方的一个窗户 * temperatures in the upper sixties, ie between 65°F and 70°F 介於华氏65度至70度之间的温度.  2 situated on higher ground or to the north or far inland 位於高地的; 靠北的或深入内陆的: Upper Egypt, ie the part furthest from the Nile delta 上埃及地区（距尼罗河三角洲最远的部分） * the upper (reaches of the) Thames 泰晤士河的上游.  3 higherin rank or wealth 级别较高的; 较富有的: the upper classes, ie of society （社会的）上层阶级 * salaries/people in the upper income bracket 属高收入等级的薪金[人们]. Cf 参看 low1 3.  4 (idm 习语) gain, get, etc the upper `hand (over sb) get the advantage (over sb); control sb （较某人）处於有利地位; 占（某人的）上风; 控制某人: Our team gained/had the upper hand in the second half. 我们队在下半场占了上风. * Don't let your feelings get the upper hand over you. 不要感情用事.a stiff upper lip => stiff. the upper crust (infml or joc 口或谑) the highest social class 社会的最高阶层: belong to the upper crust 属於上流社会.
upper 
n  1 part of a shoe or boot above the sole鞋面; 靴面; 鞋帮.  2 (infml 口) drug that gives an exaggerated feeling of cheerfulness 兴奋剂. Cf 参看 downer.  3 (idm 习语) be on one's `uppers (infml 口) have very little money 十分贫困.
upper case 
capital letters, esp in printing-type 大写字母（尤指印刷体）: titles set in upper case 以大写字母排版的标题 * [attrib 作定语] ,upper-case `titles 大写字母的标题.
the Upper Chamber (also the Upper House) 
(in the British Parliament) the House of Lords （英国议会的）上议院.
upper-cut 
n (in boxing) punch delivered upwards with the arm bent （拳击中的）上钩拳.
uppermost
/ 5QpEmEUst; `QpL9most/ adj highest in place or position or importance （位置或地位）最高的, 最上面的; 最重要的.
uppermost 
adv on or to the highest or most important position 向著或在最高或最重要的位置: Store this side uppermost, eg as a notice on a container. 此面朝上存放（如容器的标示用语）. * The children's future is always uppermost in my mind. 孩子们的前途一向是我心中最重要的事.
uppish
/ 5QpIF; `QpIF/ adj (infml 口 esp Brit) (also esp US uppity / 5QpEtI; `QpEtI/) self-assertive or arrogant 盛气凌人的; 傲慢的: Don't get uppish with me, young lady! 小姐, 别对我这麽傲慢!
upright
/ 5QpraIt; `Qp9raIt/ adj  1 in a vertical position; erect 垂直的; 直立的; 竖直的: his upright bearing/posture/stance 他的笔直的姿势.  2 strictly honest or honourable 诚实的; 规矩的; 正直的: an upright citizen 正直的公民 * be upright in one's business dealings 规规矩矩地做生意.  3 (idm 习语) bolt upright => bolt3.
upright 
adv in or into an upright position （趋於）垂直地, 直立地: sit, stand, hold oneself upright 危坐、 笔直地站著、 保持直立姿势 * pull the tent-pole upright 把帐篷杆拉正.
upright 
n  1 post or rod placed upright, esp as a support 垂直的柱子或杆子（尤指作支撑物的）: The ball bounced off the left upright of the goal. 球碰到左侧球门柱後弹开.  2 = upright piano.
uprightness 
n [U].
upright piano (also upright) 
piano with the strings arranged vertically 竖式钢琴. =>illus at App 1 见附录1插图, page xi.
uprising
/ 5QpraIzIN; `Qp9raIzIN/ n revolt against those in power; rebellion 起义; 暴动: an armed uprising 武装起义.
uproar
/ 5QprR:(r); `Qp9rRr/ n [U, sing] (outburst of) noise and excitement or anger; tumult 喧嚣; 骚动; 吵闹: The meeting ended in (an) uproar. 会议以大吵大闹收场. * There was (an) uproar over the tax increases. 税款增加引起了鼓噪. 
uproarious 
/ Qp5rR:rIEs; Qp`rRrIEs/ adj [esp attrib 尤作定语] (a) very noisy or high-spirited 喧嚣的; 骚动的; 热闹的: an uproarious welcome, evening, debate 热烈的欢迎、 晚会、 辩论 * They burst into uproarious laughter. 他们哄然大笑. (b) very funny 非常有趣的: uproarious jokes, disguises, mistakes 令人捧腹的笑话、 化装、 错误. 
uproariously 
adv: shout uproariously大声地呼喊 * uproariously funny 极其滑稽.
uproot
/ 9Qp5ru:t; Qp`rut/ v  1 [Tn esp passive 尤用於被动语态] pull (a tree, plant, etc) out of the ground together with its roots 将（树、 花草等）连根拔起.  2 [Tn, Tn.pr] ~ sb/oneself (from sth/...) (fig 比喻) force sb/oneself to leave a place where he/one was born or has become settled 迫使某人[自己]离开出生地或定居处: She uprooted herself from the farm and moved to London. 她别井离乡从农场搬到伦敦.
upset
/ 9Qp5set; Qp`sZt/ v (-tt-pt, pp upset)  1 [I, Tn](cause sth to) become overturned or spilt, esp accidentally打翻, 弄翻（某物）（尤指无意地）: upset one's cup, the milk, a plate of biscuits 弄翻了自己的杯子、 牛奶、 一盘饼乾 * A large wave upset the boat. 一个巨浪打翻了船.  2 [Tn] disrupt (a plan, etc) 打乱, 扰乱（计画等）: upset the balance of trade 打破贸易平衡 * Our arrangements for the weekend were upset by her visit. 她一来把我们周末的安排给打乱了. * Fog upset the train timetable. 这场大雾搅乱了火车的班次.  3 [Tn] (a) distress the mind or feelings of (sb) 使（某人）苦恼或心烦: be emotionally upset 心烦意乱 * Don't upset yourself -- no harm has been done. 不要难过--并没有造成伤害. * The sight of physical suffering always upsets me. 我看到身体受折磨的情形总是心惊肉跳. * He was upset at not being invited. 人家没邀请他, 他很不痛快. (b) cause (sb) to feel ill by disturbing his digestion 使（某人）感到肠胃不适: Cheese often upsets her/her stomach. 她吃乳酪後常常感到不舒服[肠胃不适].  4 (idm 习语) upset the/sb's `applecart (a) spoil a plan or disrupt an arrangement打乱计画或安排: Her refusal to help quite upset the applecart. 她不肯帮忙, 计画也就落空了. (b) disprove a theory 推翻一理论或说法. > upset / 5Qpset; `Qp9sZt/ n  1 [U, C] upsetting or being upset 翻倒; 扰乱; 不安: Last-minute changes caused a great deal of upset. 出现的临时变动造成一片混乱. * She had a major emotional upset. 她情绪上受到了沉重的打击.  2 [C] stomach disorder 肠胃不适: (infml 口) in bed with a tummy upset 因肠胃不适而卧床.  3 (in sport) unexpected result （运动）出乎意料的结局或成绩.
upshot
/ 5QpFCt; `Qp9FBt/ n [sing] the ~ (of sth) the final result or outcome 最後结果; 结局: The upshot of it all was that he resigned. 结果他辞职了.
upside-down
/ 9QpsaId 5daUn; `Qp9saId`daJn/ adj, adv1 with the upper part underneath instead of on top 上下翻转过来（的）: That picture is upside-down. 那幅画上下颠倒了. * hold a book upside-down 倒拿著书.  2 (infml fig 口, 比喻) in or into total disorder or confusion 乱七八糟（的）; 毫无条理（的）: He has an upside-down way of doing things, eg he deals with priorities last. 他做事毫无条理. * Burglars had turned the house upside-down. 窃贼 把房子翻得乱七八糟.
upstage
/ 9Qp5steIdV; `Qp`stedV/ adj, adv  1 at or towards the back of a theatre stage 在或向舞台後部（的）: an,upstage `door 舞台後门 * move upstage 向舞台後部移动.  2 (infml 口) snobbish(ly) 势利（的）; 谄上欺下（的）: They're much too upstage for us these days. 他们近来对我们太势利了.
upstage 
v [Tn]  1 cause (an actor) to face away from the audience by moving nearer the back of the stage than him （自己向舞台後部移动）使（另一演员）无法面向观众.  2 (fig 比喻) divert attention from (sb) towards oneself; put at a disadvantage 将他人注意力从（某人）引向自己; 使处於不利地位: He upstaged the other speakers by illustrating his talk with slides. 他演讲中配上幻灯片, 比其他演讲人更吸引听众.
upstairs
/ 9Qp5steEz; Qp`stZrz/ adv  1 up the stairs; to or on an upper floor 向楼上; 往楼上; 在楼上: walk, leap, sleep upstairs 走上楼、 蹦跳著上楼、 在楼上睡觉 * I was upstairs when it happened. 这件事发生时我正在楼上. Cf 参看 downstairs.  2 (idm 习语) kick sb upstairs => kick1.
upstairs 
adj situated on, living on or belonging toan upper floor 位於楼上的; 住在楼上的; 属於楼上的: an,upstairs `room, `window 楼上的房间、 窗户 * the familiesupstairs/the ,upstairs `families 楼上的住户.
upstairs 
n [sing] (infml 口) upper floor of a house, etc 房屋等的上层; 楼上: A bungalow does not have an upstairs. 平房没有上层.
upstanding
/ 9Qp5stAndIN; Qp`stAndIN/ adj [attrib 作定语] (fml or rhet 文或修辞)  1 strong, healthy and vigorous 强健而有活力的: a fine upstanding figure of a man 一个男子的强健、 匀称的体格.  2 decent and honest 正派而诚实的: upstanding members of the city council 市议会的正派而诚实的议员们.
upstart
/ 5QpstB:t; `Qp9stBrt/ n (derog 贬) person who has suddenly risen to wealth or a high position, esp one who behaves arrogantly and causes resentment 突然发迹者, 新贵, 暴发户（尤指傲慢令人反感者）: You can't marry that young upstart! 你可不能嫁给那个年轻的暴发户! * [attrib 作定语] upstart bureaucrats, financiers, officials, etc 突然发迹的官僚、 金融家、 官员等.
upstream
/ 9Qp5stri:m; `Qp`strim/ adv, adj in the directionfrom which a river, etc flows; against the current 向上游（的）; 逆流（的）: row, swim, walk upstream 往上游划、 游、 行走 * Factories upstream (from us) are polluting the water. 在（我们）上游的工厂污染了河水. Cf 参看 downstream.
upsurge
/ 5Qps\:dV; `Qp9s[dV/ n (usu sing 通常作单数) (a) ~ (in sth) sudden increase in sth; rise 急剧增长; 上升: an upsurge in sales, costs, investments 销售额、 费用、 投资额的猛增. (b) ~ (of sth) sudden rush, esp of feeling 激发; （尤指感情的）突发: an upsurge of anger, enthusiasm, violence 愤怒、 热情、 暴力行为的爆发 * an upsurge of interest in the environment 对环境问题突然发生的兴趣.
upswing
/ 5QpswIN; `Qp9swIN/ n ~ (in sth) (esp sudden) upward movement or trend; improvement （尤指突然的）向上的运动或倾向; 上涨; 改进: This policy led to an upswing in the party's popularity. 这一政策使该党深得人心. Cf 参看 upturn.
uptake
/ 5QpteIk; `Qp9tek/ n (idm 习语) ,quick/,slow on the `uptake quick/slow to understand what is meant 理解力强[弱]; 领会快[慢]: You'll have to explain it to me carefully  I'm not very quick on the uptake. 你得给我仔细解释一下--我理解力差.
uptight
/ 9Qp5taIt; 9Qp`taIt/ adj ~ (about sth) (infml 口)  1 nervously tense 精神紧张的: get uptight about exams, interviews, etc 对考试、 面试等十分紧张.  2 annoyed or hostile 恼怒的; 有敌意的: Offers of help just make him uptight. 主动帮助他反而惹他生气.  3 (US) rigidly conventional 因循守旧的.
uptown
/ 9Qp5taUn; `Qp`taJn/ adj, adv (US) in or to the outer residential districts of a town 位於或向著市镇外围住宅区（的）: uptown New York 纽约的城外住宅区 * go, drive, stay uptown 往、 开车去、 呆在城外住宅区. Cf 参看 downtown.
upturn
/ 5Qpt\:n; `Qp9t[n/ n ~ (in sth) upward trend in business, fortune, etc; improvement （生意、 运气等）好转; 改进: an upturn in the sales figures 销售额的增长 * Her luck seems to have taken an upturn/to be on the upturn. 她似乎时来运转了. Cf 参看 upswing.
upturned 
/ 9Qp5t\:nd; 9Qp`t[nd/ adj turned upwards or upside-down 向上翘的; 上下翻转过来的: a slightly,upturned `nose 稍微朝上翘的鼻子 * She felt drops of rain on her ,upturned `face. 她感到有雨点落在她仰著的脸上. * sitting on an ,upturned `crate 坐在翻转过来的板条箱上.
upward
/ 5QpwEd; `QpwLd/ adj [usu attrib 通常作定语] moving, leading or pointing to what is higher, more important, etc 移向、 引向或指向较高、 较重要等之处的; 上升的; 向上的: an upward glance, climb 向上的一瞥、 攀登 * the upward trend in prices 物价的上涨趋势.
upward (also upwards / -wEdz; -wLdz/) 
adv towards what is higher 向上地; 上升地: The missile rose upward into the sky. 导弹已升入天空. * The boat floated bottom upwards, ie upside-down. 那船底朝天漂著. =>Usage at forward2 用法见 forward2.
upwards of 
prep more than (a number) 超过（某数）: Upwards of a hundred people came to the meeting. 有一百多人来参加会议.
upward mobility 
movement into a higher and wealthier social class 向较高和较富有的社会阶层的流动. ,upwardly `mobile ready and able to move in this way 能向较高社会地位和经济地位流动的: upwardly mobile young executives 能升迁的年轻行政人员.
upwind
/ 9Qp5wInd; Qp`wInd/ adj, adv ~ (of sb/sth) in the direction from which the wind is blowing 上风向的; 逆风的; 顶风的: If we're upwind of the animal it may smell our scent. 要是我们处於那动物的上风位置, 它就能闻到我们的气味.
uranium
/ jU5reInIEm; jJ`renIEm/ n [U] chemical element,a heavy grey radioactive metal used as a source of nuclear energy 铀. =>App 10 见附录10.
urban
/ 5\:bEn; `[bEn/ adj [usu attrib 通常作定语] of, situated in or living in a city or town 市镇的; 位於市镇的; 住在市镇的: urban areas 市区 * the urban population城市人口 * urban renewal, ie the renovation of old buildings, etc 城市更新（旧建筑物等的整修） * urban guerrillas, ie terrorists operating in urban areas by kidnapping, etc 城市游击队员（进行绑架等的）. Cf 参看 rural.
urbanize, urbanise 
/ -aIz; -9aIz/ [Tn esp passive 尤用於被动语态] change (esp a rural place) into a town-likearea 使（尤指农村地区）城市化. 
urbanization, urbanisation
/ 9\:bEnaI5zeIFn; US -nI5z-; 9[bEnI`zeFEn/ n [U].
urbane
/ \:5beIn; [`ben/ adj (fml sometimes derog 文, 有时作贬义) having or showing refined manners, smooth elegance and sophistication 有礼貌的; 温文尔雅的; 老於世故的: an urbane man, wit, smile, conversation 彬彬有礼的男子、 风趣的人、 微笑、 交谈. 
urbanely 
adv. 
urbanity 
/ \:5bAnEtI; [`bAnEtI/ n [U, C].
urchin
/ 5\:tFIn; `[tFIn/ n  1 (a) (esp dated 尤作旧) mischievous or naughty child, esp a boy 顽童, 淘气鬼（尤指男孩）: You little urchin! 你这个小淘气! (b) (also `street-urchin) ragged or dirty child who is homeless and lives in poverty 街头流浪儿.  2 = sea-urchin (sea).
Urdu
/ 5UEdu:; `Jrdu/ adj, n [U] (of the) language related to Hindi but with many Persian words, used esp in Pakistan 乌尔都语（与印地语有共同处, 但含许多波斯语词, 尤使用於巴基斯坦）.
-ure
suff 後缀  1 (with vs forming ns 与动词结合构成名词) action or process of ...的动作或过程: closure * failure * seizure.  2 (with vs or ns forming ns 与动词或名词结合构成名词) group or thing having a specific function 有某功能的团体或事物: legislature * prefecture.
urea
/ jUE5rIE; ?@ 5jUrIE; `jJrIE/ n [U] white soluble crystalline compound contained esp in the urine of mammals 尿素.
ureter
/ jUE5ri:tE(r); jJ`ritL/ n either of the two tubes by which urine passes from the kidneys to the bladder 输尿管.
urethra
/ jUE5ri:WrE; jJ`riWrE/ n (pl 复数作 ~s or, in scientific use, 科技用语复数作 -rae / -ri:; -ri/) (anatomy 解) tube by which urine passes from the bladder out of the body 尿道. =>illus at male 见 male 插图.
urge
/ \:dV; [dV/ v  1 [Tn.pr, Tn.p, Cn.t] drive forcibly or hurry (a horse, etc) in a certain direction 驱赶, 驱策（马等）: urge a pony into a canter, up a slope 驱策小马慢跑、 上斜坡 * urge one's mount on, forward, north 策马继续前进、 向前、 朝北走 * She urged her mare to jump the fence. 她策马跳过障碍物.  2 [Tn, Tf, Tg, Tsg, Cn.t] try earnestly or persistently to persuade (sb) 诚恳地或持续地催促（某人）: `Don't give in now,' she urged. ｀先别认输,＇她鼓励道. * He urged that we should go/urged (our) going/urged us to go. 他催我们走.  3 [Tn, Tn.pr, Cn.t] ~ sth (on/upon sb/sth) recommend sth strongly with reasoning or entreaty 竭力推荐或力陈某事物: We urged caution. 我们特别提出要小心谨慎. * The government urged on industry the importance of low pay settlements. 政府向工商业界强调解决低工资问题的重要性. * Motoring organizations are urging drivers not to travel by road if possible. 机动车协会劝告开车的人暂时不要使用公路.  4 (phr v) urge sb on encourage or stimulate sb to do sth 鼓励或激励某人做某事: The manager urged his staff on (to greater efforts). 经理督促职员更加努力. * Urged on by his colleagues, he stood for election. 他受到同事的鼓励而参加竞选. * The need to find a solution urged him on. 亟须找出解决方法, 这是鞭策他的动力.
urge 
n strong desire or impulse 强烈的欲望或冲动: sexual urges 性欲冲动 * get, have, feel, give in to a sudden urge to travel 心血来潮去旅行.
urgent
/ 5\:dVEnt; `[dVEnt/ adj  1 needing immediate attention, action or decision 需立即注意、 行动或决定的; 紧急的; 迫切的: an urgent message, case, cry for help 紧急的消息、 情况、 呼救 * It is most urgent that we operate. 咱们得马上动手术. * My car is in urgent need of repair. 我的汽车急需修理.  2 showing that sth is urgent; persistent in one's demands 催促的; 坚持要求的: speak in an urgent whisper 低声催促. 
urgency 
/ -dVEnsI;-dVEnsI/ n [U]: a matter of great urgency 紧急的事 * I detected a note of urgency in her voice. 我从她声音中察觉到情况紧急. 
urgently 
adv: Ambulance drivers are urgently needed. 急需救护车司机.
uric
/ 5jUErIk; `jJrIk/ adj [attrib 作定语] of urine 尿的: uric acid 尿酸.
urine
/ 5jUErIn; `jJrIn/ n [U] waste liquid that collects in the bladder and is passed from the body 尿.
urinal 
/ 5jUErInl or, in British use, 英式英语读作jUE5raInl; `jJrEnl/ n building, place or receptacle for (esp) men and boys to urinate in （尤指男子用的）小便处, 小便器, 尿壶.
urinary 
/ 5jUErInErI; ?@ -nerI; `jJrE9nZrI/ adj [usu attrib 通常作定语] of urine or the parts of the body through which it passes 尿的; 泌尿的; 泌尿器的: urinary infections, organs 泌尿器感染、 泌尿器.
urinate 
/ 5jUErIneIt; `jJrE9net/ v [I] pass urine from the body 排尿; 撒尿.
urn
/ \:n; [n/ n  1 tall vase, usu with a stem and a base, esp one used for holding the ashes of a cremated person 瓮; （尤指）骨灰瓮.  2 (esp in compounds 尤用以构成复合词) large metal container with a tap, in which tea, coffee, etc is made or from which it is served, eg in cafes or canteens （供应茶、 咖啡等的）有龙头的金属容器（如小餐馆或食堂中的）: a tea urn 茶桶. =>illus 见插图.
urn
/ \:n; [n/ n  1 tall vase, usu with a stem and a base, esp one used for holding the ashes of a cremated person 瓮; （尤指）骨灰瓮.  2 (esp in compounds 尤用以构成复合词) large metal container with a tap, in which tea, coffee, etc is made or from which it is served, eg in cafes or canteens （供应茶、 咖啡等的）有龙头的金属容器（如小餐馆或食堂中的）: a tea urn 茶桶. =>illus 见插图.
us
/ Es; Es strong form 强读式 Qs; Qs/ pers pron (used as the object of a v or of a prep; also used independently and after be 用作动词或介词的宾语; 亦可单独使用, 用於be之後) me and another or others; me and you 我们; 咱们: She gave us a washing-machine. 她送给我们一台洗衣机. * We'll take the dog with us. 我们要带著那条狗去. * Hello, it's us back again! 喂, 是我们回来了! Cf 参看 we.
US
/ 9ju: 5es; 9ju `Zs/ abbr 缩写 =  1 United States (of America): a US citizen 美国公民.  2 (also u/s) (infml 口) unserviceable (ie useless): This pen's US. Give me one that writes. 这枝钢笔不能用了. 给我一枝能写的.
USA
/ 9ju: es 5eI; 9ju Zs `e/ abbr 缩写 =  1 (US) United States Army 美国陆军.  2 (esp in addresses) United States of America （尤用於地址）美利坚合众国.
USAF
/ 9ju: es eI 5ef; 9ju Zs e `Zf/ abbr 缩写 = United States Air Force 美国空军.
usage
/ 5ju:sIdV, 5ju:zIdV; `jusIdV, `juzIdV/ n  1 [U] manner of using sth; treatment 用法; 处理; 对待: The tractor had been damaged by rough usage. 这辆拖拉机因使用不经心而损坏了.  2 [U, C] habitual or customary practice, esp in the way words are used 习惯; 惯例; （尤指）词语惯用法: English grammar and usage 英语的语法和惯用法 * Languages develop continually through usage. 语言在使用中不断发展. * It's not a word in common usage. 这个词不是个普通常用词. * A dictionary helps one to distinguish correct and incorrect usages. 词典可用以辨识遣词造句的正误.
use
/ ju:z; juz/ v (pt, pp used / ju:zd; juzd/)  1 [Tn, Tn.pr, Tnt, Cn.n/a] ~ sth (for sth/doing sth); ~ sth (as sth) employ sth for a purpose; bring sth into service 用; 使用; 运用; 利用: Do you know how to use a lathe? 你会使用车床吗? * Use your common sense! 用用你的常识吧! * If you don't use (ie practise) your English you'll forget it. 英语不用就容易忘. * May I use your phone? 我用一下您的电话行吗? * A hammer is used for driving in nails. 　子是用来钉钉子的. * She uses her unmarried name for professional purposes. 她处理业务时使用娘家姓氏. * I use my bike for (going) shopping. 我买东西时骑自行车去. * We used the money to set up an irrigation project. 我们把钱用在兴建灌溉工程上了. * They used force to persuade him. 他们用武力逼他就范. * May I use your name as a reference? ie May I quote it, eg when I apply for a job? 我可以请您作我的荐举人吗? （我可否在求职信中把您的名字列入其中? ）  2 [Tn] (fml 文) treat (sb) in a specified way; behave towards （以某种方式）对待（某人）: use one's friends well 善待朋友 * He has used her shamefully. 他待她之坏, 人所不齿. * He thinks himself ill-used, ie considers that he is badly treated. 他认为遭到虐待.  3 [Tn, Cn.n/a] ~ sb/sth (as sth) exploit sb/sth selfishly 自私地利用某人[某事物]: He felt used by her. 他觉得受她利用了. * She simply used us for her own ends/to get what she wanted. 她完全是为了自己的目的而利用我们. * He used the bad weather as an excuse for not coming. 他拿天气不好作不来的藉口.  4 [Tn, Tn.pr] consume (sth) 消耗, 消费（某物）: Use the milk sparingly, there's not much left. 少用些牛奶, 剩下的不多了. * The car used a gallon of petrol for the journey. 汽车在路上消耗了一加仑汽油.  5 [Tn] (infml 口) (a) take (drugs) 服（药）. (b) (US) smoke (cigarettes, etc) 吸（烟等）.  6 (idm 习语) I, etc could use a `drink, etc (infml 口) I, etc would very much like a drink, etc 我...很想喝酒、 做某事: Boy, could I use a hot bath! 啊, 我真想洗个热水澡! use one's loaf (infml 口) think effectively; use one's intelligence 好好想想; 动动脑筋.  7 (phr v) use sth up (a) use (material
usable 
/ 5ju:zEbl; `juzEbl/ adj [pred 作表语] that can be used; that is fit to be used 可使用; 合用; 适用: This tyre is so worn that it is no longer usable. 这条轮胎磨损得很厉害, 不能再用了.
use
/ ju:s; jus/ n  1 [U, sing] ~ (of sth) using or being used 用; 使用; 运用; 利用: the use of electricity for heating利用电力供热 * learn the use of a lathe 学习使用车床 * an ingenious use of wind power 巧妙利用风力 * the use of force, terrorism, blackmail, etc 使用武力、 恐怖手段、 敲诈伎俩等 * keep sth for one's own use 保留某物以自用 * funds for use in emergencies 应急基金 * The ointment is for external use only, eg It must not be swallowed. 此药膏仅供外用. * bought for use, not for ornament 为使用购买, 非为装饰用途 * The lock has broken through constant use. 这把锁经常使用已经坏了.  2 [C, U] purpose for which sth is used; work that a person or thing is able to do 用途; 功能: a tool with many uses 有多种用途的工具 * find a (new) use for sth 研究出某物的（新）用途.  3 [U] ~ (of sth) (a) right to use sth 使用权: allow a tenant the use of the garden 准许房客使用花园 * I have the use of the car this week. 这辆汽车本星期归我使用. (b) power of using sth 使用的能力: have full use of one's faculties 充分发挥才能 * lose the use of one's legs, ie become unable to walk 失去腿部功能.  4 [U] value or advantage; usefulness 价值; 益处; 效用: What's the use of worrying about it? 著急有什麽用呢? * It's no use pretending you didn't know. 你装糊涂是无济於事的. * You're no use in the choir  you can`t sing a note! 你对合唱团毫无益处--你简直唱不成调! * Recycled materials are mostly of limited use. 再生材料大多用途有限.  5 [U] (fml 文) custom, practice or habit; usage(2) 习惯; 惯例; 词语的惯用法: Long use has accustomed me to it. 我对此已习惯成自然.  6 (idm 习语) ,come into/,go out of `use start/stop being used 开始[停止]被使用: When did this word come into common use? 这个词是什麽时候用起来的? * The present phone boxes will go out of use next year. 现有的公共电话亭明年就不再使用了. have no use for sb refuse to tolerate sb; dislike 不容忍某人; 不喜欢; 厌恶: I've no use for people who don't try. 我讨厌那些不想努力的人. have no use for sth have no purpose for which sth can be used 不需要或用不著某物: I've no further use for this type
used
/ ju:zd; juzd/ adj [usu attrib 通常作定语] (of clothes, cars, etc) having been worn, used, etc before; second-hand （指衣物、 汽车等）用旧了的, 使用过的, 二手的.
used
/ ju:st; just/ adj ~ to sth/doing sth having learned to accept sth; accustomed to sth （对某事物）已适应, 已习惯: be quite used to hard work/working hard 很习惯做艰苦的工作 * After three weeks she had got used to the extreme heat. 三个星期以後她就适应酷热的环境了. * The food in England is strange at first but you'll soon get used to it. 英国食物乍一吃很不习惯, 但不久就能适应了.
used to
/ 5ju:s tE; `justE; before vowels and finally 在元音前及末尾读作 5ju:s tu:; `justu/ modal v (neg 否定式 used not to, contracted form 缩约式 usedn't to, usen't to / 5ju:snt tE; `jusnt tE; before vowels and finally 在元音前及末尾读作 5ju:snt tu:; `jusnt tu/) (expressing a frequent or continuous action in the past; in questions and negative sentences usu with did 表达过去经常的或持续的行为, 在疑问句和否定句中通常与did连用): I used to live in London. 我过去一直住在伦敦. * Life here is much easier than it used to be. 如今在此地生活比起从前可舒服多了. * You used to smoke a pipe, didn't you? 你过去一向是抽烟斗的, 对不对?
used
NOTE ON USAGE 用法: The following negative and question patterns are old-fashioned or very formal 以下的否定形式和疑问形式是古雅的或者是正统的形式: I usedn't to like her. 我未尝喜欢过她. *  Used you to go there? 您昔时可常去那里? *  There used to be a cinema here, use(d)n't there? 往日此处曾有一影院, 不知是与不是? Most people now use patterns with did, especially when speaking or writing informally 现在大多数人使用与did连用的形式, 特别是在口语中或不拘谨的书面语中: I didn't use to like her. 我一向不喜欢她. *  Did you use to go there? 你以前常到那儿去吗? *  There used to be a cinema here, didn't there? 从前这里有一家电影院, 是不是?
useful
/ 5ju:sfl; `jusfEl/ adj  1 that can be used for some practical purpose; serviceable or helpful 实用的; 适用的; 有用的; 有益的; 有帮助的: a useful gadget, book, hint, acquaintance 有用的小机械、 书、 线索、 熟人 * do sth useful with one's life 尽自己毕生精力做些有益的事 * Videos are useful things to have in the classroom. 教室里有录像设备是很有助益的.  2 (infml 口) competent or capable 能干的; 有能力的: He's a useful member of the team. 他是该队的主力队员.  3 (idm 习语) come in handy/useful => handy. ,make oneself `useful help by performing useful tasks 做些有用的事来帮忙: My nephews tried to make themselves useful about the house. 我的侄子都想帮我收拾收拾房子. 
usefully 
/ -fElI;-fElI/ adv: Is there anything I can usefully do here? 这里有没有我能帮忙做的事情?
usefulness 
/ -fElnIs; -fElnIs/ n [U]: The old car has outlived its usefulness, ie is no longer useful or worth keeping. 这辆旧汽车已经不能用了.
useless
/ 5ju:slIs; `juslIs/ adj  1 not serving a useful purpose; not producing good results 无用的; 无效的; 无益的: A car is useless without petrol. 汽车没有汽油就不能使用. * It's useless arguing/to argue with them. 跟他们争论是徒劳无益的. * All our efforts were useless. 我们的一切努力都白费了.  2 (infml 口) weak or incompetent 差劲的; 不怎麽样的: He's a useless player. 他技艺很差. * I'm useless at maths. 我数学可不行. 
uselessly 
adv. 
uselessness 
n [U].
user
/ 5ju:zE(r); `juzL/ n (esp in compounds 尤用以构成复合词) person or thing that uses 使用者; 用户: `drug-users, `road-users 使用药的人、 使用道路的人 * I'm a great user of public transport. 我经常使用公共交通工具. * The steel industry is one of Britain's greatest users of coal. 英国煤炭的最大用户是钢铁工业.
user-friendly 
/ 9ju:zE 5frendlI; 9juzL`frZndlI/ adj (esp of computers, their software, etc) easy for non-experts to use; not difficult or intimidating （尤指计算机及其软件等）便於非专业者使用的, 不难用的, 不可怕的:a ,user-friendly `keyboard 简便的键盘 * Dictionaries should be as user-friendly as possible. 词典应尽可能便於使用.
usher
/ 5QFE(r); `QFL/  n  1 person who shows people to their seats in a cinema, church, public hall, etc or into sb's presence （电影院、 教堂、 公共大厅等的）引座员; （将客人领到某人面前的）招待员, 迎宾员.  2 door-keeper in a lawcourt, etc （法院等处的）门房, 传达员.
usher 
v  1 [Tn.pr, Tn.p] lead (sb) in the specified direction; escort as an usher 引导（某人）; 担任引座员、 招待员、 迎宾员、 门房: The girl ushered me along the aisle to my seat. 引座小姐带领我沿著通道到我的座位上去. * I was ushered in, and stood before the Queen. 迎宾员把我带进去, 站在女王的面前.  2 (phr v) usher sth in (fig 比喻) mark the start of sth; herald sth 开创、 开始或引进某事物; 预报; 预示: The new government ushered in a period of prosperity. 新政府的成立带来了一个繁荣的时期.
usherette 
/ 9QFE5ret; 9QFL`Zt/ n girl or woman who ushers people to their seats, esp in a cinema or theatre 女引座员（尤指电影院或戏院的）
USN
/ 9ju: es 5en; 9ju Zs `Zn/ abbr 缩写 = United States Navy 美国海军.
USS
/ 9ju: es 5es; 9ju Zs `Zs/ abbr 缩写 = United States Ship 美国船: USS Oklahoma 美国船俄克拉何马号. Cf 参看 HMS.
USSR
/ 9ju: es es 5B:(r); 9ju Zs Zs `Br/ abbr 缩写 = Union of Soviet Socialist Republics 苏联.
usual
/ 5ju:Vl; `juVEl/ adj  1 such as happens or is done or used, etc in many or most instances; customary 通常的; 平常的; 惯常的: make all the usual excuses 用尽司空见惯的藉口 * She arrived later than usual. 她到得比平常 晚. * As is usual with children, they soon got tired. 孩子们一贯如此, 他们很快就厌倦了. * When the accident happened, the usual crowd gathered. 事故发生时, 照例有许多人围观. * He wasn't his usual self. 他失去了常态. * (infml 口) I'll have my usual, please, ie my usual drink, etc. 请给我来一份我通常要的（我常要的饮料等）.  2 (idm 习语) as usual as is usual 像往常一样: You're late, as usual. 你像平常一样又迟到了. * As usual, there weren't many people at the meeting. 像往常一样, 来开会的人不多. business as usual => business.
usually 
/ 5ju:VElI; `juVElI/ adv in the way that is usual; most often 通常地; 惯常地: What do you usually do on Sundays? 你星期天通常做什麽? * He's usually early. 他通常到得早. * The canteen is more than usually busy today. 今天食堂比往常忙得多.
usurer
/ 5ju:VErE(r); `juVErL/ n (dated usu derog 旧, 通常作贬义) person who lends money at excessively high interest 放高利贷的人.
usurp
/ ju:5z\:p; jJ`z[p/ v [Tn] (fml 文) take (sb's power, right, position) wrongfully or by force 篡夺或武力夺取（某人的权力、 权利、 地位）: usurp the throne 篡夺王位 * usurp the role of leader 夺取领导者的地位. 
usurpation 
/ 9ju:z\:5peIFn; 9juz[`peFEn/ n [U]. 
usurper 
n.
usury
/ 5ju:VErI; `juVErI/ n [U] (dated usu derog 旧, 通常作贬义) (lending of money at) excessively high interest 高利贷; 高利.
utensil
/ ju:5tensl; ju`tZnsl/ n implement or container, esp for everyday use in the home 用具, 器皿（尤指家庭日用的）: `writing utensils, eg pencils, pens, ink 书写用具（如铅笔、 钢笔、 墨水） * `cooking/`kitchen utensils, eg pots, pans 烹调[厨房]用具（如罐、 锅）.
uterus
/ 5ju:tErEs; `jutErEs/ n (pl 复数作 ~es or, in scientificuse, 科技用语复数作 uteri / -raI; -raI/) (anatomy 解) womb 子宫. =>illus at female 见 female 插图.
uterine 
/ 5ju:tEraIn; `jutEraIn/ adj of the uterus 子宫的.
utilize, utilise
/ 5ju:tElaIz; `jutl9aIz/ v [Tn] (fml 文) make use of (sth); find a use for 利用或应用（某事物）: utilizethe available tools, resources 利用现有的工具、 资源 * utilize solar power as a source of energy 利用太阳能作为能源. 
utilization, utilisation 
/ 9ju:tElaI5zeIFn; ?@ -lI5z-; 9jutlE`zeFEn/ n [U].
utilitarian
/ 9ju:tIlI5teErIEn; 9jutIlE`tZrIEn/ adj  1 (sometimes derog 有时作贬义) designed to be useful rather than luxurious or decorative, etc; severely practical 实用的（非奢华的或装饰的）; 功利的: The student accommodation is strictly utilitarian. 为学生提供的住宿极其实惠.  2 based on or supporting the belief that actions are good if they are useful or benefit the greatest number of people 功利主义的.
utility
/ ju:5tIlEtI; ju`tIlEtI/ n  1 [U] quality of being useful 有用; 实用; 效用; 功用: [attrib 作定语] a utility vehicle, ie one that can be used for various purposes 多用途车辆 * the utility value of a dishwasher 洗碟机的实用价值.  2 [C] = public utility (public).
utility room 
room, esp in a private house, containing one or more large fixed domestic appliances, eg a washing-machine 杂用间（放置大件家用电器如洗衣机的房间, 尤指私人住宅的）.
utmost
/ 5QtmEUst; `Qt9most/ (also uttermost / 5QtEmEUst;`QtL9most/) adj [attrib 作定语] greatest; furthest; most extreme 最大的; 最远的; 极度的: in the utmost danger 在极端的危险中 * of the utmost importance 极重要的 * with the utmost care 极其小心 * pushed to the utmost limits of endurance 逼到忍无可忍的程度.
the utmost (also the uttermost) 
n [sing]  1 the greatest, furthest or most extreme degree or point, etcthat is possible 最大限度; 极限: enjoy oneself to the utmost尽情享乐 * Our endurance was tested to the utmost. 我们已忍无可忍了.  2 (idm 习语) do/try one's `utmost (to do sth) do or try as much as one can 竭力; 竭尽所能: I did my utmost to stop them. 我已竭尽全力制止他们.
Utopia
/ ju:5tEUpIE; ju`topIE/ n [C, U] imaginary place or state of things in which everything is perfect 乌托邦: create a political Utopia 创造政治的乌托邦.
Utopian 
/ -pIEn; -pIEn/ adj (usu derog 通常作贬义) having or aiming for the perfection of Utopia but impossible to achieve; idealistic 乌托邦的; 空想的; 理想主义的: Utopian ideals 不切实际的理想.
utter
/ 5QtE(r); `QtL/ adj [attrib 作定语] (used to give extra emphasis to a n 用以加强名词的词义) complete; total; absolute 完全的; 彻底的; 绝对的: utter darkness, bliss, nonsense 漆黑、 极乐、 纯粹的废话 * an utter lie, disaster 极大的谎言、 灾难 * to my utter delight, astonishment, etc 使我十分高兴、 吃惊等 * She's an utter stranger to me. 我根本不认识她. 
utterly 
adv: She utterly despises him. 她非常瞧不起他. * We failed utterly to convince them. 我们根本说服不了他们.
utter
/ 5QtE(r); `QtL/ v [Tn] (a) make (a sound or sounds) with the mouth or voice （以口）发出（声音）: utter a sigh, cry of pain, etc 发出叹息声、 痛苦的叫喊声等. (b) say or speak 说; 讲: utter threats, slanders, etc 说出威胁、 毁谤等的话 * He never uttered a word of protest. 他从来没说一句反对的话.
utterance 
/ 5QtErEns; `QtErEns/ n (fml 文)  1 [U] action of uttering or expressing things in words 用言语表达: give utterance to one's feelings, thoughts, views, etc 以言语表达感情、 思想、 观点等 * The speaker had great powers of utterance. 那个演讲人很有口才.  2 [C] spoken word or words; thing said 话语; 言语: private/public utterances 私下的[公开的]话.
uttermost
= utmost.
uvula
/ 5ju:vjUlE; `juvjElE/ n (pl 复数作 ~s or, in scientific use, 科技用语复数作 -lae / -li:; -9li/) (anatomy 解) small piece of flesh that hangs from the back of the roof of the mouth above the throat 悬雍垂; 小舌. =>illus at throat 见 throat 插图.
uxorious
/ Qk5sR:rIEs; Qk`sRrIEs/ adj (fml or joc 文或谑) excessively fond of one's wife 宠爱妻子的.