But I can't...I can't play second banana to your brother.

但我做不到跟在你哥后面做男二号。

The funniest comedian is called " the top banana." The next is " second banana." And so on.

最有趣的喜剧演员被称为top banana，接下来就是second banana，以此类推。

A top banana is the leading person in a comedy show. The funniest comedian is called the top banana. The next is second banana. And so on.

Top banana是喜剧中的主角。最有趣的喜剧演员被称为top banana，略逊色的是second banana。以此类推。