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once on on-board bill of lading on trust on this score on the watch on the up grade

once
[英] [wʌns] [美] [wʌns] 生词本

adv.

conj.

n.

  • 柯林斯高阶英汉双解学习词典

  • 英英释义

  • 行业释义

  • 词典例句

1. ADV 一次；一回 If something happens once, it happens one time only. 

  • I met Wilma once, briefly...

    我曾经和威尔玛有过短短的一面之缘。

  • Since that evening I haven't once slept through the night...

    从那天晚上之后，我没有睡过一次安稳觉。

  • Mary had only been to Manchester once before.

    玛丽以前只去过一次曼彻斯特。

  • Once is also a pronoun.

    • 'Have they been to visit you yet?' — 'Just the once, yeah.'...

      “他们来看过你吗？”——“来过，就一次。”

    • Listen to us, if only this once.

      听我们的吧，哪怕就这么一次。

2. ADV （与后接day, week, month等的a连用）（每…）一次，（每…）一回 You use once with 'a' and words like 'day', 'week', and 'month' to indicate that something happens regularly, one time in each day, week, or month. 

  • Lung cells die and are replaced about once a week...

    肺细胞约每周新老更替一次。

  • We arranged a special social event once a year to which we invited our major customers.

    我们每年举办一次专门的社交活动，邀请重要客户出席。

3. ADV （与后接day, week, year等的every连用）（每隔…）一次，（每隔…）一回 You use once with 'every' and words like 'day', 'week', and 'year' to indicate that something happens a specified number of times and on a regular basis. 

  • The patient was seen for follow-up visits once every three months...

    这位病人每三个月接受一次随访就诊。

  • My daughter comes to visit me once every fortnight.

    我女儿每两周来看我一次。

4. ADV 曾经，一度（状况如此） If something was once true, it was true at some time in the past, but is no longer true. 

  • The culture minister once ran a theatre...

    这位文化部长曾经经营过一家剧院。

  • I lived there once myself, before I got married...

    我结婚前曾独自在那儿住过。

  • The house where she lives was once the village post office...

    她现在住的房子曾经是村里的邮局。

5. ADV 曾经（做过某事） If someone once did something, they did it at some time in the past. 

  • I once went camping at Lake Darling with a friend...

    我曾和一位朋友在达令湖畔露营。

  • We once walked across London at two in the morning...

    我们曾在凌晨两点步行穿过伦敦。

  • Diana had taken that path once.

    黛安娜曾走过那条路。

6. CONJ-SUBORD 一旦…（就…); 一…（就…） If something happens once another thing has happened, it happens immediately afterwards. 

  • The decision had taken about 10 seconds once he'd read a market research study...

    在他看过一份市场调研报告后大概10秒钟就作出了决定。

  • Once customers come to rely on these systems they almost never take their business elsewhere...

    顾客一旦依赖上这些系统，几乎就不会光顾其他商家。

  • Once inside her apartment she felt an urge to brush her teeth.

    一回到自己的公寓，她就有一种想要刷牙的冲动。

7. PHRASE 突然；忽然 If something happens all at once, it happens suddenly, often when you are not expecting it to happen. 

  • I feel terribly sleepy all at once...

    我突然觉得特别困。

  • All at once there was someone knocking on the door.

    忽然有人敲门。

8. PHRASE 立即；马上 If you do something at once, you do it immediately. 

  • I have to go, I really must, at once...

    我得走了，我真的必须马上就走。

  • Remove from the heat, add the parsley, toss and serve at once...

    端离炉子，加上欧芹，颠起翻面后就立刻上桌。

  • The audience at once greeted him warmly.

    观众立即对他作出了热情的反应。

9. PHRASE 同时；一起 If a number of different things happen at once or all at once, they all happen at the same time. 

  • You can't be doing two things at once...

    不能一心二用。

  • No bank could ever pay off its creditors if they all demanded their money at once...

    如果所有的储户同时要求提取存款，没有哪家银行能办得到。

  • She seems at once feminine and able to cope in a man's world.

    她看起来既有女人味，又能在男人的世界里游刃有余。

10. PHRASE 就此一次；破例一次 For once is used to emphasize that something happens on this particular occasion, especially if it has never happened before, and may never happen again. 

  • For once, dad is not complaining...

    爸爸这次破天荒地没有抱怨。

  • His smile, for once, was genuine.

    只有这一次，他真诚地笑了。

11. PHRASE 又一次；再次 If something happens once again or once more, it happens again. 

  • Amy picked up the hairbrush and smoothed her hair once more...

    埃米拿起发梳，再次将头发梳理整齐。

  • Once again an official inquiry has spoken of weak management and ill-trained workers.

    官方调查又一次提到了管理不力与工人缺乏训练的问题。

12. PHRASE 彻底地；一劳永逸地 If something happens once and for all, it happens completely or finally. 

  • We have to resolve this matter once and for all...

    我们必须彻底解决这一问题。

  • If we act fast, we can once and for all prevent wild animals in Britain from suffering terrible cruelty.

    如果我们迅速采取行动，就可以一劳永逸地使英国的野生动物免受残忍的虐待。

13. PHRASE 偶尔；间或 If something happens once in a while, it happens sometimes, but not very often. 

  • Earrings need to be taken out and cleaned once in a while.

    耳环要偶尔取出来清洗一下。

  • Once in a while she phoned him.

    她间或会给他打个电话。

14. PHRASE 一两次；几次 If you have done something once or twice, you have done it a few times, but not very often. 

  • I popped my head round the door once or twice...

    我有几次头撞到了门上。

  • Once or twice she had caught a flash of interest in William's eyes...

    有那么一两次，她发现威廉的眼睛里流露出一丝感兴趣的神色。

  • She gazed up at him, blinking once or twice, apparently surprised at his cleverness.

    她抬头注视着他，偶尔才眨一下眼睛，显然对他的聪明才智颇为惊讶。

15. PHRASE （常用于儿童故事的开头）从前，很久以前 Once upon a time is used to indicate that something happened or existed a long time ago or in an imaginary world. It is often used at the beginning of children's stories. 

  • 'Once upon a time,' he began, 'there was a man who had everything.'...

    “很久很久以前，”他开始说道，“有这么一个人，他应有尽有。”

  • Once upon a time, asking a woman if she has a job was quite a straightforward question.

    从前，问一位女性是否有工作是个相当简单直接的问题。

16.   once in a blue moon→see: moon; 
Adjective

1. belonging to some prior time;

  • "erstwhile friend"
  • "our former glory"
  • "the once capital of the state"
  • "her quondam lover"
Adverb

1. on one occasion;

  • "once I ran into her"

2. as soon as;

  • "once we are home, we can rest"

3. at a previous time;

  • "once he loved her"
  • "her erstwhile writing"

土木工程

<名>
  • 1.直流冷却水系统
  • 2.once-through cooling water system
  • 3.直流水系统
  • 4.once-through water system

电力

<名>
  • 1.抛弃法烟气脱硫
  • 2.once-through FGD process
  • 3.直流锅炉
  • 4.once-through boiler
1. About once in ten years snow falls on Mexico City.
墨西哥城大约每隔十年降一次雪。

来自《现代汉英综合大词典》

2. Africa was once parceled out among the European powers.
非洲一度为欧洲列强所瓜分。

来自《简明英汉词典》

3. After ten years' hard study noticed by none, his fame fills the land once honours are won.
十年寒窗无人问，一举成名天下知。

来自《现代汉英综合大词典》

4. After the theatre let out, the street was at once thronged with people.
戏院散场以后，街上顿时挤满了人。

来自《现代汉英综合大词典》

5. Aha, you've lost to me for once.
哈哈，这回可输给我了。

来自《现代汉英综合大词典》

6. Alaska was once possessed by Russia.
阿拉斯加一度曾是俄国的领土。

来自《简明英汉词典》

7. All at once I fell into a state of profound melancholy.
我立即陷入无限的愁思之中。

来自《现代汉英综合大词典》

8. All at once he fell into a state of profound melancholy.
他立即陷入无尽的忧思之中。

来自《简明英汉词典》

9. All at once, I noticed that my wife seemed to be filled with alarm.
我突然觉察到我的妻子好象十分惊恐

来自《用法词典》

10. All the batteries fired at once.
万炮齐发。

来自《现代汉英综合大词典》

11. All the members of the family get together once a year.
全家成员每年团聚一次。

来自《简明英汉词典》

12. Although she had only met the old man once, he had made an indelible impression on her.
虽然她和那老人只见过一面，可却在她心上留下了不可磨灭的深刻印象。

来自《现代汉英综合大词典》

13. America was once the home of many Indian tribes.
美洲曾经是许多印第安部落的故土。

来自《简明英汉词典》

14. Any infectious disease must be notified at once to the Health Ministry.
出现任何传染病都必须马上通知卫生部。

来自《简明英汉词典》

15. As regards John, I will write to him at once.
至于约翰，我会立即给他去信。

来自《简明英汉词典》

16. As regards Luther,I will write to him at once.
至于卢瑟，我会立即给他去信。

来自《简明英汉词典》

17. As the case stands, you must leave here at once.
照现在情况看，你必须马上离开这里。

来自《现代英汉综合大词典》

18. Chichester set off once more in spite of his friends' attempts to dissuade him.
奇切思特不顾朋友们的劝阻，再次启程远航。

来自《简明英汉词典》

19. Come here at once!
立刻到这儿来！

来自《现代汉英综合大词典》

20. Don't think this job a piece of cake. You'll have to rack your brains once you start on it.
别以为这工作是易如反掌的事，你做了就知道它是很伤脑筋的。

来自《现代汉英综合大词典》