U /ju:/ noun, abbr.
m noun (also u) [C, U] {pi. Us, U^, uJs
/ju:z/) the 21st letter of the English alphabet英语字母表的第21个字母： ‘l/ncter’ begins with 间[7/t/’. * under —词以字母 u 开头。 —see also U-boat, U-turn
■ abbr. {Br£) universal (the label
of a film/movie that is suitable for anyone including children) * U 类影片（适
合所有观众）：AkiddiVi, cem^cate C7 * U类电影《阿拉
丁》
'U-bend noun a section of pipe
shaped like a U, espe- cially one that carries away used water (..尤指污水管 的）U形弯头，马蹄弯头，U形管 uber- (also iiber-) /'u:b9(r)/ combiningform (from German, (in nouns and
adjectives 构成名—和形容词）of the greatest or
best kind; to a very large degree 梟好 的；超级的：His giri_/Hend was a
rea〗 uber-babe, m'tft long btomie hair ancf a big smfZe.—他的★友甚个® 级靓 妞，一头长长的金发，脸上带着灿烂的笑容。OTTie movi’e stars the uber-cooZ Jean Rena 超级酷哥让•雷诺
演> 出这部影片。
ubi.qui.tous
/jui'bikwitas/
adj. [usually before noun] {formal
or
humorous) seeming to be
everywhere or in several places at the same time; very common 似乎无 所不在的；十分普遍的：t/ie ubiquitous
bicydes 〇/ univemfy towns夫学城里处处可见的自行车the ubiquitous movie
star, Tom ffcmfcs 尽人皆知&影星汤姆 •、没 克 ►
ubi-qui-tous-ly adv. ubi-quity /jui'bikwati/ noun ju]: the ubiquity 〇/ the mass media 大厶传媒的无射不在
'U-boat noun a German submarine (= a ship that can travel
underwater)(德国 HJ 潜艇 ubuntu /u'buntu/ noun [U] {SAfr£) the idea that people
are not only individuals but live in a community and must share things and care
for each other 班图 _ 神， 社团关爱精神（生活在集体中，大家必须分享物品并互相
关心）
u.c. abbr. (in writing upper
case
UCAS /'jurkaes/ abbr. (in
国）髙校招生服务处
UDA /ju: di: 'ei/ abbr.
尔兰防务协会（非法军事组织，主张北爱尔兰继续保持为
英国的一部分）
udder /'Ad0(r)/ noun an organ shaped like a
bag that produces milk and hangs underneath the body of a COW，GOAT，etc.(母牛、母羊等的）乳房
UDR /ju: di: 'a:(r)/ abbr. Ulster Defence
Regiment (a branch of the British army in Northern Ireland, now forming part of
the Royal Irish Regiment)北爱尔兰防卫
军（英罕的一部分）
UEFA /ju'eifa/ abbr.
UFO (also ufo) /ju: ef'au; 'jurfau; NAmE ju: ef'ou; 'jurfou/ noun {pi UFOs) a strange object that
some people claim to have seen in the sky and believe is a spacecraft from another planet
(abbreviation for ‘Unidentified Flying Object’）不明飞行物（全写为 Unidentified Flying
Object) — compare flying saucer uf〇l-〇gy /ju:'fDl9d3i; NAmE -'fail-/ noun [U] the study of UFOs不明飞行物学
ugali /u:'ga：li/ noun [U] (£/\/r£) a type of
food made with flour from corn (maize)
or millet, usually eaten with
meat or vegetable stew玉米{或桌米）袼团,米粉糕
(通常和炖肉或蔬菜一起吃）
ugh (also urgh) exclamation the way of writing the
sound ( /3：/ /ux/) that people make when they think
2-183 ulna
that sth is disgusting or
unpleasant (表示厌恶或不快）
咳，呸：t/gh/ How can you eat that stujf?咳！你怎么能
吃|卩玩意儿呢？
Ugli™ /'Agli/ (also Ugli fruit) noun a large citrus fruit with a rough,
yellowish-orange skin and sweet flesh with a lot of juice丑橘（大柑橘类水果，果皮粗糙.呈淡
橙色，果肉甜而多汁>
Ugly /'Agli/ adj. (ug-lier, ugli-est)
1 unpleasant to look at 丑陋如；难看的 unattractive ： an ug沙 /ace 丑陋的面孑L ◊ an ugZy buiiding 难看的建筑 2 (of an event, a
situation, etc•.事 件、局势等）unpleasant or dangerous; involving threats or
violence令又不快的；危险的；险恶的；凶险的：an ugZy incident 危险事件◊ rhere were ugiy scenes 出 the streets Zast night as
rioting continued•昨晚暴乱持续之 际，街上险象环生。► ugli.ness nown [U] see rear v., sin n.
,ugly 'duckling noun a person or thing that
at first does not seem attractive or likely to succeed but that later becomes
successful or much admired 丑小鸭（初 似平庸后来出众的人或事物 >【•】;，咖厘From the title of a story by Hans
Christian Andersen, in which a young swan thinks it is an ugly young duck until
it grows up into a beautiful adult swan.源自安徒生童话，讲述一只
小天鹅一直认为自己是只丑小鸭，长大后却变成了美丽的
天鹅。
uh
exclamation the way of writing the
sound /a/ or /3：/ that people make
when they are not sure about sth, when they do not hear or understand sth you
have said, or when they want you to agree with what they have said (表示不肯定、不清楚或征求同意）嗯，唔： t/h, yeah, J guess so•嗯，对，我想是这样。◊‘Are you readyyet?’‘Uh?Oh.他.’ “你准备好了吗？ “嗯？噢，
好了。” ◊ VWe can discuss t/iis anot/ier rime, uh?这秦咱 们以后再说，嗯？
UHF /ju: eitj 'ef/ abbr. ultra-high frequency
(a range of radio waves used for high-quality radio and television broadcasting)超高频
'uh-huh
exclamation the way of writing the
sound that people make when they understand or agree with what you have said,
when they want you to continue or when they are answering‘Yes’（表示理解、赞同、希望
对方继续或作肯定答复）嗯，哦，喔，啊：you read mynote?’‘[7h-huh.’ “你看了我的条子没有？ ”“嗯 'uh-oh (also 'oh-oh) exclamation the way of writing the
sound that people make when they want to say that they have done sth wrong or
that they think there will be trouble (表示做错了事或感到有麻烦）哎哟，哦唷： Uh-oh. J/orgot to write that ietter.哦唷，我忘了写那封
信了。◊ l/h-o/i/ rum the 7VoJ5f. Here comes Dad/ u女唸！ 把电视关掉！爸爸来了！
UHT /ju: eitj 'ti：l abbr.
(Br^) ultra heat treated.
UHT milk has been heated to a very high temperature in order to make it last
for a long time.经高温处理的 uh-uh exclamation the way of writing the
sound /'a a/ that people make
when they are answering ‘No’ to a question (表示不同意）嗯，嘘 uja-maa /,ud3ae'ma:/
noun [U] (in Tanzania) socialism (坦桑尼亚）乌贾马，社会主义
UK (also U.K. especially in L/S)
/ju: 'kei/ abbr. United Kingdom
uku-lele /juika'leili/ noun a musical instrument
with four strings, like a small guitar 尤克莱利琴（四弦小
吉他）
ulcer /'Alsa(r)/ noun a sore area on the
outside of the body or on the surface of an organ inside the body which is
painful and may bleed or produce
a poisonous substance 溃痛： a stomach uZcer 胃溃疡一see also
MOUTH ULCER
ul-cer-ate /'Alsareit/ verb [V, VN] [usually
passive] {medical
'■医）to become, or make sth
become, covered with ulcers (使）形成溃疡，溃烂►ul.cer.ation AAls^reiJn/ noun [U, C]
ulna /'Aina/ noun (pi. ulnae /-ni:/) (anatomy M) the longer bone of the
two bones in the lower part of the arm