The reality is: sometimes you lose. And you're never too good to lose. You're never too big to lose. You're never too smart to lose. It happens.

I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.

安全不是产品的附加功能，而是基石。

成功是日复一日小努力的累积。