—— 请按键盘 空白键 开始游戏 ——

The secret of a good old age is simply an honorable pact with solitude.
No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
I'm not a product of my environment. My environment is a product of me.