—— 请按键盘 空白键 开始游戏 ——

What is the difference between a Turing machine and the modern computer? It's the same as that between Hillary's ascent of Everest and the establishment of a Hilton hotel on its peak.
我不害怕失败,因为我知道它是成功的一部分。
A good mathematician is always ready to generalize.