—— 请按键盘 空白键 开始游戏 ——

I don’t live in the past. I don’t live in the future. I live now.
数学不是一项观赏性运动。你必须亲自去做才能理解它。
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.