A mathematician's work is never done; there are always new questions to explore and new mysteries to uncover.

Never be afraid of the moments--thus sings the voice of the everlasting。

Profitability and responsibility must go hand in hand.

效率是把事情做对，效果是做对的事情。

解释：所谓把粮食积存在取之不尽的粮仓里，就是要努力从事粮食生产。

大自然是伟大的老师，当别人睡觉时，我从她那里学得最好。