When making something， always get a few extras — extra material， extra parts， extra space， extra finishes. The extras serve as backups for mistakes， reduce stress， and fill your inventory for the future. They are the cheapest insurance.

"The best way to learn mathematics is to do mathematics."

The study of psychology is not just about understanding others; it's also about understanding ourselves.

在认识到热是粒子运动后，很容易得出结论：这种运动必然遵循力学的一般规律。

我是一个女人，我有不完美之处……我为此感到自豪。