Once

有一次海洋学家跟踪一些波浪。

他从未[根本没]主动提出帮忙.

安哥拉曾经是葡萄牙的领土。

我们的生命只有一次，但我们如能正确地运用它，一次足已。

我每两个月与他们见一次面。

【串】曹操在许昌once(一次),喝许多ounce(盎司),摔酒杯bounce(弹起),颤抖着pronounce(发音) 【记】※ on-在,ce-拼音“册”:曾经在纪念册上留言 ※ one-一,c-似“月亮”:曾不止一次的想去月亮上 ※ on-上,ce-拼音“厕”:我曾经有一次上厕所,不小心掉下去了

once adv 1 on one occasion only; (for) one time 仅仅一次; （作为）一次 I've only been there once. 我只去过那里一次. He cleans the car once a week, a fortnight, etc, ie every week, every fortnight, etc. 他一星期、 半月等擦一次车. She goes to see her parents in Wales once every six months. 她每半年回威尔士看父母一次. 2 (a) at some (indefinite) time in the past 一度; 曾经 I once met your mother. 我曾经见过你的母亲. He once lived in Zambia. 他一度住在赞比亚. (b) formerly 从前; 过去; 往日 This book was once famous, but nobody reads it today. 这本书从前很出名, 现在没人看了. 3 (in negative sentences or questions 用於否定句或疑问句) ever; at all; even for one time 根本; 即使一次 He never once/He didn't once offer to help. 他从未[根本没]主动提出帮忙. Did she once show any sympathy? 她表示过同情吗? 4 (idm 习语) ,all at `once suddenly 突然 All at once the door opened. 门突然打开了. All at once she lost her temper. 她突然大发雷霆. at `once (a) immediately; without delay 立刻; 马上; 立即 Come here at once! 立刻到这里来! I'm leaving for Rome almost at once. 我马上就要去罗马. (b) at the same time 同时 Don't all speak at once! 不要大家一齐说! I can't do two things at once. 我无法同时做两件事. The film is at once humorous and moving. 这部电影既幽默又动人. (just) for `once; just this `once on this occasion only, as an exception 仅此一次; 作为例外 Just for once he arrived on time. 只有这次他是按时到了. Be pleasant to each other just this once. 彼此要和睦些--就只为这一次吧. get/give sb/sth the `once-over (infml 口) get/give sb/sth a quick inspection or examination 粗略检查或察看某人[某事物] Before buying the car he gave it the once-over. 他买那辆车前曾草草看了一下. She felt his parents were giving her the once-over. 她感到他父母打量著她. once `again; once `more one more time as before 再一次 I'll tell you how to do it once again. 我再告诉你一次怎麽做. Amanda is home from college once again. 阿曼达又从学校回到家中. ,once and for `all now and for the last (and only) time 这一次且为最後一次 I'm warning you once and for all. 我给你最後一次警告. He's travelled a lot but he's now come back to Britain once and for all. 他游历了许多地方, 现在落叶归根又回到了英国. ,once `bitten, ,twice `shy (saying 谚) after an unpleasant experience one is careful to avoid sth similar 一次被咬, 下次胆小; 一次上当, 下次小心 She certainly won't marry again once bitten, twice shy. 她肯定不再结婚了--所谓一朝被蛇咬, 十年怕井绳. ,once in a blue `moon (infml 口) very rarely or never 极少; 从不 I see her once in a blue moon. 我难得看到她. (every) ,once in a `while occasionally 偶尔; 间或 Once in a while we go to a restaurant but usually we eat at home. 我们偶尔下馆子--但一般都在家吃. once `more (a) one more time; again 再一次; 又一次 Let's sing it once more. 咱们再唱一次吧. (b) = once again. ,once or `twice a few times 一两次 I don't know the place well, I've only been there once or twice. 我对那地方不大熟悉, 只去过一两次. ,once too `often once more than is sensible or safe 这一次却未能幸免 He had driven home drunk once too often -- this time he got stopped by the police. 他多次醉酒开车回家, 上得山多终遇虎--这回让警察截住了. ,once upon a `time (used as the beginning of a fairy-tale 用於童话开头) at some indefinite time in the past 从前; 古时候 Once upon a time there was a beautiful pr...

一（one）次（c）

*[wʌns]ad. 一次, 曾经, 一旦conj. 一旦, 一经n. 一次a. 从前的相关词组: once or twice not once all at once at once at once...and... more than once once more once and again once and away once and for all once in a way once in a while once too often just for once once upon a time once a week