—— 请按键盘 空白键 开始游戏 ——

唯一的限制是你为自己设定的限制。
The surest way to prevent war is not to fear it.
数学家的工作永无止境;总有更多的问题需要解决。
【讲解】:有了过错,别人都能看到;改了,人们都会敬仰他。
When players scold you, it's a good thing—it means they still care. The most terrible thing is silence.