—— 请按键盘 空白键 开始游戏 ——

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
The true history of a people is written in the margins of official history.
Fear is not the enemy. It is the refusal to face it that destroys us.
Man is the measure of all things: of things which are, that they are, and of things which are not, that they are not.
父亲过于慈爱,不忍心鞭策子女,那么家里就容易出现品德败坏的子女。