Stay focused on what you can control, and don’t waste energy on what you can’t.

一个力学问题只有被简化为代数问题时才算解决。

The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.

我们必须将经济增长与环境退化脱钩。