—— 请按键盘 空白键 开始游戏 ——

如果你只经历过美好的事情,你就不可能勇敢。
The whole art of teaching is only the art of awakening the natural curiosity of young minds for the purpose of satisfying it afterwards.
The work is a kind of excavation.
In mathematics, the art of proposing a question must be held of higher value than solving it.