| 单词 | once |
| 释义 | adverb | conjunction onceonce1 /wʌns/ ●●● S1 W1 adverb 1ONE TIME on one occasion, or at one time: I’ve only worn this dress once. They’d met once before at a party. He’s threatened me more than once.2once a week/month/year etc. one time every week, month, etc. as a regular activity: Staff meetings take place once a week.3once every three weeks/two months/five years etc. one time in every period of three weeks, two months, etc. as a regular activity or event: She sends a bill once every six months.4(every) once in a while sometimes, but not often: I only see her every once in a while at school.5once more/again a)one more time SYN again: He kissed her once more and moved toward the door. b)used to say that a situation changes back to its previous state SYN again: Everyone had left and the house was quiet once again. c)formal used before you repeat something that you said before: Once again, I’d like to thank everyone for coming tonight.6at once a)at the same time, together: I can’t do two things at once! We were angry, ashamed, and afraid all at once. b)formal immediately, or without delay: Come here at once!7IN THE PAST at some time in the past, but not now: They had once been close friends.once-great/once-beautiful/once-powerful etc. The once-elegant city was now a war zone.8EVER used with negatives, in questions, and after “if” to mean “ever” or “at all”: I never once saw him get angry or upset.9for once used to say that something which is happening is rare or unusual, especially if you think it should happen more often: Just for once, let me make my own decision. For once I agree with him.10once and for all definitely and finally: Let’s settle this matter once and for all.11(just) this once spoken used to emphasize that this is the only time you will let someone do something, ask someone to do something, etc.: OK, you can stay up till 11, but just this once.12all at once suddenly: All at once the trailer started shaking.13once upon a time a)a phrase meaning “a long time ago,” used at the beginning of children’s stories b)at a time in the past that you think was much better than now: Once upon a time children did what they were told.14once or twice a few times, but not often: The same thing had happened once or twice before.15once in a blue moon informal very rarely: We go out to eat once in a blue moon.16do something once too often to do something until you make someone angry or until you are finally caught, hurt, etc.: He tried that trick once too often.17once is enough spoken used to say that after you have done something one time you do not need or want to do it again18once a ..., always a ... spoken used to say that people stay the same and cannot change the way they behave and think: Once a thief, always a thief.19once bitten, twice shy used to say that people will not do something again if it has been a bad experience adverb | conjunction onceonce2 ●●● S1 W2 conjunction just after something happens, or from the moment that something happens: I called Lara once he’d left. |
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