当你面对一个拧不动的螺栓或螺丝钉的时候：右转是拧紧，左转是拧松。
When you confront a stuck bolt or screw: righty tighty， lefty loosey.
The more you can see, the more you can feel.
The purpose of psychology is to explain how we manage to live.
史记
自由的代价比镇压的代价要低。