| 单词 | once |
| 释义 | adverbconjunction🔑 onceBrE /wʌns/ NAmE /wʌns/ adverb 🔑 on one occasion only ; one time 仅一次；一次◆ 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。◆ (informal ) He only did it the once . 这种事儿他仅仅干过一次。🔑 at some time in the past 曾；曾经◆ 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。used in negative sentences and questions , and after if to mean 'ever' or 'at all' （用于否定句、疑问句和 if 后）曾，根本◆ 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。 ● ˌall at ˈonce 🔑 suddenly 突然；骤然；忽然◆ All at once she lost her temper . 她突然大发脾气。🔑 all together ; at the same time 一起；同时SYN simultaneously◆ 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。● at ˈonce 🔑 immediately ; without delay 立即；马上◆ Come here at once ! 马上到这里来！at the same time 同时SYN simultaneously◆ 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 ˈonce ● just this ˈonce (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）◆ 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 ˈonce , going ˈtwice , ˈsold (especiallyNAmE ) (BrE alsoˌgoing , ˌgoing , ˈgone ) said by an auctioneerto show that an item has been sold （拍卖师用语）一次，二次，成交● once aˈgain 🔑 ● once ˈmore 🔑 one more time ; another time 再一次；再次◆ 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 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…◆ Once an actor , always an actor . 一朝从艺，永为艺人。● once and for ˈall now and for the last time ; finally or completely 最终地；最后地；彻底地；一次了结地◆ We need to settle this once and for all . 我们需要把这事一次解决。● ˌonce ˈbitten , ˌtwice ˈshy (saying ) after an unpleasant experience you are careful to avoid sth similar 一朝被蛇咬，十年怕井绳● once in a blue ˈmoon (informal ) very rarely 极少地；难得地；破天荒地● (every ) ˌonce in a ˈwhile occasionally 偶尔地；间或● ˌonce or ˈtwice 🔑 a few times 一两次；几次◆ 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。● ˌonce too ˈoften used to say that sb has done sth wrong or stupid again , and this time they will suffer because of it 侥幸难再◆ You've tried that trick once too often . 你故伎重施，可这次再逃不脱了。● ˌonce upon a ˈtime used , especially at the beginning of stories , to mean 'a long time in the past' （用于故事的开头）从前，很久以前◆ Once upon a time there was a beautiful princess . 从前，有一位美丽的公主。🔑 onceBrE /wʌns/ NAmE /wʌns/ conjunction as soon as ; when 一…就；一旦；当…时候◆ 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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