他记得查理曾经在一次聚会上唱歌。

He remembered Charlie once sang at a party.

youdao

它扁平的形状意味着土卫八曾经旋转得非常快，完成一次自转需要16个小时。

Its flattened shape implies that Iapetus once spun very quickly, completing a rotation in 16 hours.

youdao

我曾经看过这部电影一次。

I have ever watched this film once.

youdao

Milton had written in Areopagitica that he had actually met Galileo on his journey, when Milton was a young man and Galileo was a very old man, through the continent.

弥尔顿在中已经写到,他实际上在旅途中曾经遇到过伽利略，那还是当他是一个年轻人，而伽利略已然老去的，一次环陆旅行中。

耶鲁公开课 - 弥尔顿课程节选

But there's extra, again, insult to injury, when the person's got to remember that he used to be something extraordinary, a ruler.

但当这人不得不记着，他曾经位高权重，是统治者的时候,这又一次，是在伤口上撒盐。

耶鲁公开课 - 死亡课程节选

There has been a long discussion about what people owe each other and how okay it is to try to make money.

曾经有一次很长的讨论,是关于自己欠别人多少,而自己应该赚多少才合适

耶鲁公开课 - 金融市场课程节选