—— 请按键盘 空白键 开始游戏 ——

The greatest innovations are often the simplest.
Silence remains, inescapably, a form of speech.
The pain of parting is nothing to the joy of meeting again.
O for a life of sensations rather than of thoughts!
Mathematics is a living subject, constantly evolving and growing.
过去的知识与我们同在,激励我们取得新的成就。