没有任何人知道他能做什么，直到他试一试才知道。

Nobody knows what he can do till he has tried.

youdao

只有他自己才知道他自己能做什么。

None but he knows what that is which he can do.

youdao

只有他自己才知道他自己能做什么。

None but he knows what that is which he can do.

youdao