有一段时间，他们好像大有获胜的希望。

At one stage it looked as though they would win.

《牛津词典》

这些指控到现在已经持续有一段时间了，但那不过是酸葡萄心理而已。

These accusations have been going on for some time now, but it is just sour grapes.

《柯林斯英汉双解大词典》

曾经有一段时间，制造肥皂并不安全。

At one time, soap-making was not safe.

youdao

And I think there was a time when that sense of dominion was used as justification for using those resources only to serve human needs.

我想，有一段时间里，这种统治感,被人们当做使用资源的借口,仅仅为了满足人类的需求。

普林斯顿公开课 - 人性课程节选

They believe that there's a decent chance that they will die within a certain period of time.

他们相信自己在一段特定的时间后,有可能死亡。

耶鲁公开课 - 死亡课程节选

But, you can see that he was thinking about this structure for all along.

但我们可以想象得到,他对这个结构的思考已经有很长一段时间了。

麻省理工公开课 - 固态化学导论课程节选