It's not surprising, therefore, that people should be eating more fruits and vegetables, and our ancestors were eating much more.

因此毫无疑问,人们应该吃更多的水果和蔬菜,而我们的祖先吃的更多

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

and one of your friends has had too much to drink, and he should not be driving himself home.

你有一个朋友已经喝高了，他已经不能自己开车回家了。

I can 课堂 - SpeakingMax英语口语达人

Actually, those guys would be useful, not so much, hardly at all during the scrum of the phalanx, but should one side be retreating.

尽管远程兵种的作用有限,尤其是双方混战时几乎形同虚设,但当一方撤退时,他们的作用就显现了

耶鲁公开课 - 古希腊历史简介课程节选