【释义】：当面赞誉他人的人往往不够忠诚，只注重外表修饰的人往往缺乏真情实意。

我了解到你不可能取悦每个人，这没关系。

数学的真正力量在于它简化复杂事物的能力，使不可理解的事物变得可理解。

We need diversity of thought in the world to face the new challenges.

Materials have memory; they carry time and stories.

The only thing worse than training employees and losing them is not training them and keeping them.

你必须准备好受苦并享受这种痛苦。