画虎画皮难画骨,知人知面不知心。
人心难测,表面友善的人,内心未必真诚。  
Psychology must study the adaptive functions of thought and behavior.
你无法满足所有人的要求。
Sustainability isn't an option; it's a responsibility we owe to future generations.
The language of mathematics is universal, and it is through this language that we can communicate the most profound truths of the universe.
唯一让我紧张的时候就是当我必须做自己的时候。