The best way to learn mathematics is to do mathematics.

回归均值是金融市场的铁律。

It is not from the benevolence of the butcher， the brewer， or the baker that we expect our dinner， but from their regard to their own interest.

我喜欢在压力下比赛，我喜欢困难的情况。

计算机是一种表达媒介，就像钢琴是一种表达媒介一样。