—— 请按键盘 空白键 开始游戏 ——

世界会打击每一个人,但经历过后,许多人会在受伤的地方变得更坚强。
我们不是从祖先那里继承皮革,而是从子孙那里借来的。
The art of doing mathematics consists in finding that special case which contains all the germs of generality.