天外有天，山外有山。

　　47、Bad luck often brings good luck.

　　塞翁失馬，安知非福。

　　48、Business is business.

　　公事公辦。

　　49、Clumsy birds have to start flying early.

　　笨鳥先飛。

　　50、Do one thing at a time, and do well.

　　一次只做一件事，做到最好!