必须有出口，才能维持我们的经济。

Exporting is necessary for our economic survival.

《牛津词典》

必须有人要对这些凶杀事件负责。

Someone must be held accountable for the killings.

《牛津词典》

申请人必须有自己的交通工具。

Applicants must have their own transport.

《牛津词典》

I run out of the house and then usually around 3 o'clock somebody points out, in one case a homeless man, that I have a big glob of shaving cream in my ear or-- because I neglected to actually look in the mirror while I shaved.

然后冲出家门,大概到了下午三点时，会有人跟我说，有一次是一个流浪汉，告诉我，我耳朵上有一团剃须膏-,因为我剃须时忘了,照镜子。

耶鲁公开课 - 心理学导论课程节选