—— 请按键盘 空白键 开始游戏 ——

The only way to learn mathematics is to do mathematics.
我不能也不愿生活在谨慎的世界里,至少作为作家不行。我向你保证,我宁愿如此——那样生活会更容易。但不幸的是,谨慎不适合小说家。
The best feeling is when you know you've done everything right and the car is just perfect.
Theorems are the milestones of mathematics.