在数学中，最简单的问题往往能引出最深刻的见解。
In mathematics, the simplest questions often lead to the deepest insights.
We must bridge the gap between rural producers and urban consumers.
You will be judged on how well you treat those who can do nothing for you.
真理的概念与自由的概念不可分割。
Disobedience, in the eyes of any one who has read history, is man's original virtue. It is through disobedience that progress has been made, through disobedience and through rebellion.