—— 请按键盘 空白键 开始游戏 ——

数学的乐趣在于发现的旅程,而不仅仅是目的地。
If you’re not failing occasionally, you’re not pushing the boundaries enough.
If I knew where I would meet my end, I would avoid it my entire life.
Education is not about filling a bucket, but about lighting a fire.