That guy is a bad egg.

那个家伙是坏蛋。

We all know he is a bad egg.

我们都知道他是个大坏蛋。

A bad egg has a disgusting smell.

臭蛋滋味很难闻。

A person who could do this must be a bad egg.

能办出这种事的人准是个坏种.

At first I trusted him, but soon I found he's a bad egg.

起初我信任他，但不久就发现他是个道德败坏的人。