四月爆发的猪流感虽然已经褪去，但是在这之前旅游业还是受到了重创。

An outbreak of swine flu in April has receded, but not before wreaking havoc on the tourist industry.

youdao

但是在这之前，我想要对上堂课结束之前，我们考虑的那些论证，进行最后的点评。

But before we do, I wanna make a last couple of comments about the argument we were considering at the end of last class.

youdao

但是，在这之前，我还有一点需要准备。

But first I had a point to settle.

youdao

But before we do, I wanna make a last couple of comments about the argument we were considering at the end of last class.

但是在这之前，我想要对上堂课结束之前,我们考虑的那些论证,进行最后的点评。

耶鲁公开课 - 死亡课程节选

But before I can put in those ten more, I am already over to 4s.

但是在我放这十个电子之前，我已经把4s轨道排好了。

麻省理工公开课 - 固态化学导论课程节选