Have you ever milked a cow?

你给奶牛挤过奶吗？

Now a study has found it really does help people nod off if it is milked from a cow at night.

现在一项研究发现，如果是晚上从奶牛身上挤的奶，确实能帮助人们打盹。

It is milked form a cow at night.

这些奶是晚上从奶牛身上挤的。

Two farmers each claimed to own a certain cow. While one pulled on its head and the other pulled on its tail, the cow was milked by a lawyer.

两个农夫分别宣布拥有某头牛，当他们一个抓着牛头另一个抓着牛尾（相持不下）时，牛奶最终都会被律师挤走。