数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

The structure of DNA was a puzzle that demanded to be solved.

There is only one road in the world that no one but you can take. Where does it lead? Don't ask, just walk.

当市场下跌时，你轻易的将好东西打折变卖，但是一旦市场向上，再想买回来，难之又难。