—— 请按键盘 空白键 开始游戏 ——

做自己的自由是只有你自己才能给予自己的礼物。但一旦你做到了,没有人能把它夺走。
"The freedom to be yourself is a gift only you can give yourself. But once you do, no one can take it away."
The present is always an unstable place, the past is where we think we know where we are.
The P versus NP problem is one of the most important problems in computer science.