—— 请按键盘 空白键 开始游戏 ——

我们都是自己的监狱,也是自己的狱卒。
"History is not the past but a map of the past, drawn from a particular point of view, to be useful to the modern traveller."
The most dangerous lies are the ones we believe about ourselves.
学习数学的唯一方法就是做数学。