解释：屋顶是否有漏洞，下面的人才知道。

There is no such thing as a happy ending.

我们不是从祖先那里继承地球；我们是从子孙那里借来的——这在林业中尤其如此。

Today is cruel, tomorrow is crueler, and the day after tomorrow is beautiful, but most people will die tomorrow night and won't see the sun of the day after tomorrow.

The art of simplicity is a puzzle of complexity.

The best ideas often come from listening to those closest to the problem.

Kindness is the language which the deaf can hear and the blind can see.

Resilience and adaptability are key in infrastructure development.

在把所有这一切搞得混淆不清时，人们非但没有使我们明理，反而使我们变得邪恶。

教育是使人变得有道德的艺术。