—— 请按键盘 空白键 开始游戏 ——

布尔值最好的地方是即使你错了,你也只错了一点点。
Forests are the lungs of the earth—let's not suffocate them.
数学不是一项观赏性运动。你必须参与其中。
Sometimes you can do everything right and things will still go wrong. The key is to never stop doing right.