—— 请按键盘 空白键 开始游戏 ——

在数学中,就像在生活中一样,最深刻的发现往往来自于提出最简单的问题。
A good building must be able to absorb the traces of human life.
如果人类不能在我有生之年登陆火星,我将会非常失望。
The safest course is to do nothing against one's conscience.With this secret, we can enjoy life and have no fear from death.
当一扇门关闭时,你要知道,另一扇门正在打开。