人不能以流水作为镜鉴，只能在静止的水面照见自己。

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.

基于抽象的模块化是应该采取的方式。

最好的性能改进是从非工作状态到工作状态的转变。