You have to be able to admit when you’re wrong and get out of a losing position quickly. The worst thing you can do is hold onto a losing trade hoping it will come back.
大都市作为一个有辨别力的生物，要求人比乡村生活更多的意识。
The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when to be obeyed.
I'm not perfect, but I'm always me.
不成熟的诗人模仿；成熟的诗人偷窃。
P与NP问题是计算机科学中最重要的一个问题之一。