定理不是偶然发现的。

Life is not what one lived, but what one remembers and how one remembers it in order to recount it.

The best time to plant a tree was 20 years ago. The second best time is now.

世界是一个非常复杂的地方，并不总是容易理解我们周围发生的事情。

品牌是企业的形象，只有打造好品牌才能赢得市场。