刘翔是我所见过的最勤奋的运动员。

 

16、All in all， we cannot live without… But at the same time we must try to find out new ways to cope with the problems that would arise.

 

总之，我们没有…是无法生活的。但同时，我们必须寻求新的解决办法来对付可能出现的新问题。

 

17. In short , we must work hard to make the world a better place .