我是在一段时间之前见到她的。

I saw her some time ago.

youdao

你会高兴于一段时间之前必须发生的事情，但只有现在才意识到。

You'll be glad of something that had to happen some time ago, but only now is it time to realize.

youdao

中国也公开声称，它将在22世纪到来很长一段时间之前赶上美国，并成为世界最大的经济体。

China also officially claims that it will catch up with the United States and become the world's largest economy well before the 22nd century arrives.

youdao

It's still--they can make losses for a long time before they're in trouble, so presumably there won't be a problem, but in principle there could be and so that's the kind of issue that we have now.

在陷入困境之前的很长一段时间内,他们可以承受亏损,也可以假设不会有任何问题发生,但是原则上讲是有可能会出问题的,这就是我们面临的现状

耶鲁公开课 - 金融市场课程节选

for a while before deciding, "I'd rather teach high school

那是在我下决定之前的一段时间，“我宁愿教高中，

我的专业 - SpeakingMax英语口语达人