The streets were dark with something more than night.
如果用心一旦松散,那么万事都做不好。如果用心一旦粗疏,那么凡事不能聚精会神。用心一旦固执,凡事就不能见其本来面目。
不要让你的收件箱变成代办清单。
学习数学的最好方法就是做数学。
The simplest solutions are often the most elegant.
I’m not perfect, and I don’t pretend to be.