任何事件的概率是依赖于该事件发生的期望值与事件发生时预期值之间的比率。

The greatest happiness is to know the source of unhappiness.

We are all bound by the social contract to obey the laws， but we also have the right to participate in making those laws.

The best fertilizer is a farmer's knowledge mixed with nature's wisdom.

I am now physically incapable of doing any of the things I used to enjoy, but I don’t miss them.

善于学习的人，能够透彻地知道事情的道理；善于实践的人，能够把事情疑难之处弄清楚。