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once

美 [wʌns]
英 [wʌns]
  • adv.一次;曾经;仅一次;根本
  • conj.一旦;一…就;当…时候
  • n.一次
  • adj.从前的
  • 网络一度;一奏倾情;有一次
once
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adv.
1.
仅一次;一次on one occasion only; one time
I've only been there once.
我只去过那里一次。
He cleans his car once a week.
他每周洗一次汽车。
She only sees her parents once every six months.
她每半年只探望一次父母。
He only did it the once .
这种事儿他仅仅干过一次。
2.
曾;曾经at some time in the past
I once met your mother.
我曾经见过你母亲。
He once lived in Zambia.
他曾在赞比亚生活过。
This book was famous once, but nobody reads it today.
这本书曾名噪一时,但现在却无人问津。
3.
(用于否定句、疑问句和 if 后)曾,根本used in negative sentences and questions, and afterif to mean ‘ever’ or ‘at all’
He never once offered to help.
他从没有主动提出过帮忙。
If she once decides to do something, you won't change her mind.
她一旦决定干什么,谁也改变不了她的主意。
IDM
All at once she lost her temper.
她突然大发脾气。
I can't do everything all at once─you'll have to be patient.
我不能万事一把抓呀。你可急不得。
all at once
突然;骤然;忽然suddenly
All at once she lost her temper.
她突然大发脾气。
一起;同时all together; at the same time
I can't do everything all at once─you'll have to be patient.
我不能万事一把抓呀。你可急不得。
Come here at once!
马上到这里来!
Don't all speak at once!
大家不要同时讲!
I can't do two things at once.
我不能同时做两件事。
at once
立即;马上immediately; without delay
Come here at once!
马上到这里来!
同时at the same time
Don't all speak at once!
大家不要同时讲!
I can't do two things at once.
我不能同时做两件事。
Just for once he arrived on time.
只有这一次他按时到了。
Can't you be nice to each other just this once?
难道你们就不能彼此客气哪怕一次?
(just) for once|just this once
(informal)
仅此一次(与通常情况对比而言)on this occasion (which is in contrast to what happens usually)
Just for once he arrived on time.
只有这一次他按时到了。
Can't you be nice to each other just this once?
难道你们就不能彼此客气哪怕一次?
going once, going twice, sold
(拍卖师用语)一次,二次,成交said by an auctioneer to show that an item has been sold
Once again the train was late.
火车又一次晚点了。
Let me hear it just once more.
让我再听一遍。
once again|once more
再一次;再次one more time; another time
Once again the train was late.
火车又一次晚点了。
Let me hear it just once more.
让我再听一遍。
Once an actor, always an actor.
一朝从艺,永为艺人。
once a…, always a…
(表示一个人不能改变) 一次为…便永远是…used to say that sb cannot change
Once an actor, always an actor.
一朝从艺,永为艺人。
We need to settle this once and for all.
我们需要把这事一次解决。
once and for all
最终地;最后地;彻底地;一次了结地now and for the last time; finally or completely
We need to settle this once and for all.
我们需要把这事一次解决。
once bitten, twice shy
一朝被蛇咬,十年怕井绳after an unpleasant experience you are careful to avoid sth similar
once in a blue moon
(informal)
极少地;难得地;破天荒地very rarely
(every) once in a while
偶尔地;间或occasionally
I don't know her well, I've only met her once or twice.
我跟她不很熟,我只见过她一两次。
once or twice
一两次;几次a few times
I don't know her well, I've only met her once or twice.
我跟她不很熟,我只见过她一两次。
You've tried that trick once too often.
你故伎重施,可这次再逃不脱了。
once too often
侥幸难再used to say that sb has done sth wrong or stupid again, and this time they will suffer because of it
You've tried that trick once too often.
你故伎重施,可这次再逃不脱了。
Once upon a time there was a beautiful princess.
从前,有一位美丽的公主。
once upon a time
(用于故事的开头)从前,很久以前used, especially at the beginning of stories, to mean ‘a long time in the past’
Once upon a time there was a beautiful princess.
从前,有一位美丽的公主。
conj.
1.
一…就;一旦;当…时候as soon as; when
We didn't know how we would cope once the money had gone.
一旦钱花光了,我们就不知道该怎么办了。
The water is fine once you're in!
你一旦下了水,就会觉得水里挺舒适。

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