Zived fn Zambia.他曾在赞比亚生活过。◊ This book was /amous once, but
nobody reads ft today.这本书曾名噪一
时，但现在却无人问津。3
used
in negative sentences and questions, and after 1/ to mean ‘ever’ or ‘at all’ ■(用 于否定句、疑问句和if后）曾，根本：He never once qfifered to hdp.他从没有主动提出过帮忙。◊ J/ she once decides
to do something, you won?t change her mind. M 一旦决定干什么，谁也改变不了她的主意。IM,aH
at ’once 1 suddenly 突然；骤然；叙然：AH at once she Zost her
temper. M突&夫发脾气。2 all together; at the same
time—起；词时
PHTl
simultaneously- I carCt do everything all at once—you'll have to be
patient,
能万事一把抓呀。你可急不得。at ‘once 1 immediately; without delay 立即；乌上：Come here at once/ 马上 jij 这里来！ 2 at the same time 同时 PfiTl simultan-
eously: Don’t
aH speafc at once/大家不要同时讲！ ’◊ I can’t do two
things at once•我不能同‘。（just) for 'once | just this 'once {informal) on this occasion (which
is in contrast to what happens usually)仅此一次 (与通常情况对比而言）：Jiist/or once he arrived on time•只有这一次他按时到了。◊ Can’t you be nice
to each ot/ier just this once?难道你们就不能彼此客，哪 怕一次？ going 'once, going ‘twice, 'sold (espec/a//)/ NAmi) =
going, going, gone at gone once a'gain | once 'more one more time; another time
再一次；再
次:■ Once again the train was 〖ate•火车文一永:晚点了。
◊
let me hear t't just once more•让我再听-一遍。once a , always a ... used to say that sb cannot
change (表示一个人不能改变）一次为…便永远是…：Oncean
actor, ahvays an actor. —朝从艺，_ 永为艺人。once and for 'all now and for the last time;
finally or completely 最终地；最后地；彻底地；一次了结;We need to settle this once and/or aH.我们需要把这事一次解决。
,once
'bitten, .twice 'shy {saying) after an unpleasant experience you are careful to avoid sth similar
—朝被
蛇咬，十年伯井绳
once 丨n a blue ’moon (/Vj/orma/) very rarely棱少地；难得地；破天荒地（every),once
in a Vhile occasionally 偶尔地；间或,once oi* ‘twice a few times —
两次；几沃：I don't know her well, Vve
only met her once or twice.我跟她不很熟；我只见过她一两次。
.once too
'often used
to say that sb has done sth wrong or stupid again, and this time they will
suffer because of it 烧幸难再：YouVe tried that trick
once too o/ten.你故技金施，可这次再逃不脱了。.once upon a 'time used, especially at the
beginning of stories, to mean ‘a long time in the past’（用于故事的开头 i 从 前，很久以前：O/ice upon a time there was
a beaut(/iuZ princess•从前，有一位美丽的公主。
■ con_/. as soon as; when —
…就;。’一旦；当■…时候：We didn't know how we would
cope once the money had gone.—旦钱花光了，我们就不知道该怎么办了。oTTie vrnter is _/?ne once
you’re in/ 你一‘旦下了水，就会觉得水
里挺舒适。
once-over noun IT*!?! give
sb/sth a/the 'once-over
{informal) 1 to look at sb/sth
quickly to see what they or it are like 匆匆打量；随彳^ 看一眼 2 to dean stii quickly 匆匆打扫：She gave the room a quick
once-over be/ore the guests arrived.趁客人还没来，命匆匆把屋子打
扫了一下。
on.col.ogy
/Dr)'kDl0d3i;
NAmE an'karl-/ noun [u] the scientific study of and
treatment of tumours in the body 肿瘤学► on.colo.gist /Di3_kDlad3ist; AMmf a:n’ka:l-/ noun
〇n-c〇m-ing /'DnkAmirj; NAmE'am-; 'D：n-/ adj. [only before noun] coming towards you迎面而来的；即将来临的
HPITl
approaching ： Always walk facing the
oncoming traj^c.走路一定要面向驶来的车辆。
One /wAn/ number,
m number, det. 1 the number l - ： Do you want one or two?你要一个还是两个？
◊
There’s onZy room /or one person•只有一个人的空丨'司。◊ One more, please/请再来 一个！
◊
a one-bedroomed apartme/it —间卧室的公寓房
◊
n! see you at one
(=
2 used in formal language or for emphasis before hundred, thousand, etc., or before a unit
of measurement (正式 用语或表强调
，用在 hundred、 thousand 等或 度量单位之前）:一：ft.cost one hundred pounds.
那东西花了一百五十英镑。◊ He lost by 〖ess them one second.他以不到一秒钟的差距输了比赛。3
used
for
emphasis to mean ‘a single’ or ‘just one’（表强调）单
独一个，仅仅r个：There’s tmZy one thing we can <io.我 能做的只古一件事。4 a
person or thing, especially when they are part of a group (尤指一组+ 的广一个
人，一件_物：One 〇/ my 介iends ifves in Brighton■我的 一个朋在布莱顿。◊ One
p〖ace J’d reaHy
Zifce to vi^t & Ba〖i.我真正想去的一个地方就是巴厘岛。5 used for emphasis to mean
‘the only one’ or ‘the most important one’ (表强调）唯一的一个，最重要的一个：H^s the one person J can trust.他是我唯一可以信赖的人。◊ Her one concern was /or the
health 〇/ her baby•她 _ 一操心 的就是孩子的健康。◊ ft’s
the one thing J can’t stand about him•这是我最不能容忍他的一件事。6 used
when you are talking about a time in the past or the future, without actually
saying which one (用于广般地谈论过
去或将来的某个时间）：/saw her one a_/temoo/i 〖ost weefc.我在上周的一个下午见到了她。◊ One day (= at some
time in the future) youlZ understand 总有一天你 .会明白的.。7 the same _—个：TTiey aH went
in one direction.他们都朝同一个方向走了。8(/7?/〇/?^/，65/疋-
cially NAmE) used for emphasis instead
of a or an { a 或 an,表示强调）：rAat was one ZieH o/a game/ 那t- 场比赛简;i一塌_涂！ ◊ She’s one snappy dresser. M的 穿着很入时。9 used with a person’s name
to show that .the speaker does not know the person (与人名连用，
表示说话人不认识的人）某一个m71 A CERTAIN : He worfced as an assistant to
one Mr Ming.他给一位明先
-生当.助手。IT»TB1 as one (formal) in agreement; all together —致；一齐：We spoke as one on this matter. 在这个问题±義们口径一致。（be) at ’one (with sb/sth) (formal) to feel that you completely
agree with sb/sth, or that you这re part of sth.完全一致；是…的一部分：a place where you can feel at one with
nature 到与大自然由为一体的地方for ’one used to emphasize that a
particular person does sth and that you believe other people do too就是其中之一（表达意见时用以加强 语气）：/〇/* one, wouZd pre/er to postpone the meeting. i喊推迟4期的，我就是一个。get sth in 'one to understand or guess sth
immediately 立即明白（或猜
到）get one 'over (on) sb/sth (/Vj/orwci/) to get an
advantage over sb/sth.占 J：风；胜;iit占优势：J’m not gofn^ to Zet them get one over ori me/.我决不让他们胜过
我！ go one .’better (than sb/sth) to do sth better than sb
else or than you have done before 胜人一筹；，.（比自
'己过去）做得更好 H171 outdo： She did well this year and next year she hopes to go one better.今年她.干得不
错，她希望明年更上一层楼。in ‘one used to say that sb/sth has
different roles, contains different things or is used for different purposes 集于一身（或一体）；多功
能；多用途：She's a mother and company director in one.她蚨是母亲又是公司董事。◊
ft’s a puWic rdations office, a press office and a private office all in
one. 3)1 既是公关办公室，也是新闻办公室，.又是私人办公室：三
位一体。_see also all-in-one ,one after a nother/ the 'other first one person or thing,
and then another, and then another, up to any number or amount —个接 一个地；陆续地；络绎不绝;The bills kept coming in, one filter another.账单纷至沓来。，one and 'all (o/d- fashioned, informal) everyone # ^ ;大家；每个
A :
Happy Afew year
to one and aH/ 位新年快余！
,one and 'only used to emphasize that sb is famous 绝无仅 有的；唯一的；有名的：Here Zie is, the one and on〖y Van Morrison/他来f，这盖世无双的范•莫里森！，one
and the 'same used for emphasis to mean *the same* (表 示强调）同一个.：J never reaZized Ruth
RendeH and Barbara Vine were one and the same (= the same person using two different
names)•我从未妓识到鲁思•兰德尔
和色芭拉，•瓦因原来是_一个人。，one by 'one separately and in order 途 个地;.逐一地
：
/ went through the items.'on
the tot one by one•我逐条看了清单上的条目。
,one or 'two a few —; -二：IVe’ve had one or two
problems一nothing serious.我们有一些问題，不过没什
么大不 了的。.one 'up (on sb) having an advantage over sb
略無一筹；强金（某人）when you’ve seen, heard, etc.
'one, you’ve seen, heard, etc. them 'all {saying) used to say that all types of the things
mentioned are very similar所有的…都大词小异；知其
一便知其全部：J don’t 〖ifce science Action novek
much.