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Merriam-Webster's Advanced Learner's Dictionary

導出

once

15 ENTRIES FOUND:

¹ once /ˈwʌns/ adverb

¹ once

/ˈwʌns/

adverb

Learner's definition of ONCE

: one time only一次

I will repeat the question once.我会重复一次问题。
We try to get together (at least) once every month.我们争取每月（至少）聚一次。
The play was performed only once.这部剧只演出了一次。
He had ridden a horse only once (before).他（以前）只骑过一次马。
We go to the movies once or twice a month. [=we go to the movies a few times a month]我们每月去看一两回电影。
I've only seen her once or twice. [=I have only seen her a few times]我只见过她一两次。

: at any one time : ever任何一次；从来

She didn't once thank me.她从未谢过我。
He didn't look at me once.他从来没瞧过我一眼。

: at some time in the past过去；曾经

It was once done that way.以前曾经那样做过。
A river once flowed through this canyon.过去曾有条河流经这个峡谷。
It was once a booming mining town.这里曾经是一座繁荣的矿业镇子。
Their music was once very popular.他们的音乐曾经非常流行。

— sometimes used in combination有时用于合成词

a once-successful actor曾红极一时的演员
a once-popular restaurant曾一度受欢迎的饭店

once again/more

: for another time : one more time : again再一次

Let me explain the problem once again.让我再解释一下这个问题。
Once again, you've ignored my instructions.你又一次忽视了我的指令。
Could I hear the question once more?我能再听一次问题吗？

once and for all

: now and for the last time最后地；彻底地

Let's settle this problem once and for all.我们把这个问题彻底解决了吧。
Winning its fourth straight championship game, the team proved once and for all that they are the best.连续四次赢得比赛冠军，球队彻底证明了自己是最好的。
I'm asking you once and for all.我最后问你一遍。
Please, once and for all, stop worrying.最后再说一遍，请别担心了。

once bitten, twice shy

— see ¹bite

once in a blue moon

— see blue moon

once in a while

: sometimes but not often : occasionally偶尔地；间或

We spend most of our time at home and go out once in a while.我们大部分时间都待在家里，偶尔出门。
Every once in a while, we have wine with dinner.我们偶尔在晚餐时喝葡萄酒。

once upon a time

: at some time in the past从前；过去

He was a famous actor once upon a time.他以前是位著名演员。

◊ Once upon a time is the traditional way to begin a fairy tale.“从前…”是童话故事传统的开篇语。

Once upon a time, there was a beautiful princess named Snow White.从前，有一位美丽的公主叫白雪公主。

² once /ˈwʌns/ noun

² once

/ˈwʌns/

noun

Learner's definition of ONCE

[noncount]

: one single time一次

I have tried Indian food more than once.我不止一次品尝过印度美食。
Please be on time just this once.就这一次请准时。
For once you seem to know what I'm talking about.这次你似乎知道我在说什么。

at once

: at the same time同时

two people talking at once同时说话的两个人
The book is at once [=both] funny and sad.这本书既有趣又伤感。
She had several projects going on all at once.她同时进行着几个项目。

: right away : without delay : immediately立刻；马上

We need to leave at once.我们需要马上离开。
You can call the office and get advice at once.你可以给办公室打电话，立刻就能得到建议。

³ once /ˈwʌns/ conjunction

³ once

/ˈwʌns/

conjunction

Learner's definition of ONCE

: at the moment when : as soon as…就

Things got better once he found a job. = Once he found a job, things got better.他一找到工作情况就好转了。
Once she spoke, I recognized her.她一开口我就认出了她。

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最近搜尋：

once

once again/more

once and for all

once bitten, twice shy

once in a blue moon

once in a while

once upon a time

at once

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