A legal system is a system of rules which are valid according to the system's own criteria of validity.
当你需要知识就像你在水底需要空气时，你准能得到它。
In mathematics, the art of proposing a question must be held of higher value than solving it.
创新不仅仅是技术的问题，更是思维方式的问题。
And when your stomach is empty and your mind is full,it's always hard to sleep.
The individual investor should act consistently as an investor and not as a speculator.
We die. That may be the meaning of life. But we do language. That may be the measure of our lives.