NP完全性不仅仅是一个理论上的好奇心；它对实际计算有着深远的影响。

You think when you wake up in the mornin yesterday don't count. But yesterday is all that does count. What else is there? Your life is made out of the days it's made out of. Nothin else.

The only limits in life are the ones you set for yourself.

If somebody offers you an amazing opportunity but you are not sure you can do it, say yes – then learn how to do it later!

集合起一百个伟大头脑，就会得到一个大傻瓜。