我们在考试前加了几节课。

We slotted in some extra lessons before the exam.

《牛津词典》

恐怕我们永远无法在考试前完成复习了。

We're afraid we will never manage to finish our revision before the exams.

youdao

当你的书本里布满彩虹般的标记时，你不必在考试前把所有的内容都读一遍。

When your chapter is a rainbow of markings, you don't have to read all of it again before an exam.

youdao

I don't expect you'll all immediately grab it, but you will need to understand it before the quiz comes along.

我不期望你们马上就能掌握，但是你们需要在,考试前弄懂它。

麻省理工公开课 - 计算机科学及编程导论课程节选