她斩钉截铁地说以前从未见过这个男人。

She averred that she had never seen the man before.

《牛津词典》

巴特斯说以前人们认为丝虫病是遗传性的。

People used to think filariasis was hereditary, Butts says.

youdao

你说以前一个年轻拉丁裔女孩能主演电视剧？

A young Latina girl as the center of a network television show?

youdao

I'm not quite sure,because we have to turn to a metaphysical question that we've touched upon before,namely,can souls split?

我不太确定，因为要先提出一个以前说过的,形而上学的问题，就是，灵魂可以分裂么？

耶鲁公开课 - 死亡课程节选

I mean, you may not understand it with algebra before but some of these sorts of pictures have you seen before?

我是说可能代数部分你没看懂,但你们以前见过类似的图像吧

耶鲁公开课 - 博弈论课程节选

Bisection methods were known to the ancient Greeks, and it is believed by many, even to the Babylonians.

二分法由古希腊人所发明,我以前也说过，一直到17世纪二分法都被。

麻省理工公开课 - 计算机科学及编程导论课程节选