世间万物，唯有变化才是永恒不变的法则。

我从不后悔我生命中做过的任何事或任何选择。

I'm not a rapper, I'm a rock star.

To avoid criticism, do nothing, say nothing, be nothing.

For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.

There are no such things as applied sciences, only applications of science.