Inequality is not inevitable. It is a result of policy choices.

It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.

The greatest inventions are those which most directly meet the wants of mankind.

技术创新可以提高效率并减少采矿作业对环境的影响。

Psychology is the science of mental life.

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。

试错的成本是最低的。