—— 请按键盘 空白键 开始游戏 ——

The beauty of mathematics is that it is eternal, it doesn't change.
The mind is not a thing, but a process—an ever-changing flow of experiences and adaptations.
历史不是过去。历史就是现在。我们随身携带着历史。
我们今天在林业上的每一个决定都会在未来几代人中产生影响。