Where have gone all those promises you once said?

你曾经说过的所有承诺已经？

youdao

Once or twice I heard her muttering, but when I said, "Sorry? What did you say?" she didn't respond.

有一两次我听见她在嘀嘀咕咕，但当我说“抱歉? 你说什么？”时，她没有回答。

《柯林斯英汉双解大词典》

Roberto Clemente once said: "Anytime you have an opportunity to make things better and you don't, then you are wasting your time on Earth."

VOA: special.2010.04.11

And it's not a la-di-dah thing where--I'll tell you, once there was a student in there who had really fantastic French and I said, "Why is your French so good?"

其实也不是那么严格要求的,我给你们讲,以前有个学生法语特好,我就问他你法语怎么这么好啊

耶鲁公开课 - 1871年后的法国课程节选

Having said that, at the same time, once you have the idea,

说了这些，同时，你一旦有了想法，

事业就是挑战 - SpeakingMax英语口语达人

Chief Justice Roberts: Well, once you said it is not, and you don't know the answer to it?

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Scott Fitzgerald (or Ernest Hemingway, depending on whom you believe) once said.

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You know, someone said once upon a time, after you become president of the United States, you don't make any new friends.

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