英语笑话之猴子会和跳蚤有什么不同呢？

What's the difference between a monkey and a flea?

猴子和跳蚤有什么不同呢?

A monkey can have fleas, but a flea can't have monkeys.

猴子身上可以长跳蚤，而跳蚤身上却不能有猴子。