人类需要悲伤，正如需要欢乐一样。
我宁愿做一个失败的作家，也不愿做一个成功的银行家。
When we are planning for posterity， we ought to remember that virtue is not hereditary.
I'm a woman full of flaws, but I try to make up for them with passion and love.
数学是解开宇宙秘密和理解支配它的基本法则的关键。
地球是一个动态的物体，其表面在不断变化。