为了预防回来以前天就黑了，所以他带著手电筒。

He took a flashlight lest it should get dark before he returned.

youdao

很多年以前天文学家就已经知道，有些星系的组成中没有任何一颗新形成的星体，它们都是由一些年代十分久远的恒星组成的。

Astronomers have also known for years that some large galaxies don't seem to be forming any new stars; they are full of aging SUNS.

youdao

噢，我前天发货给你们，今天下午货就该到你们那里了。

Well, I dispatched them to you the day before yesterday, and they should arrive this afternoon.

youdao