实现真正自由的唯一途径是通过自律。
The truth is you don't know what is going to happen tomorrow. Life is a crazy ride, and nothing is guaranteed.
一个问题如果在计算机上可以快速解决，那么它属于P类问题；如果一个解可以快速验证，那么它属于NP类问题。
I know of only one duty, and that is to love.
The best technology is invisible—it just works seamlessly.