—— 请按键盘 空白键 开始游戏 ——

The only thing we have to fear is fear itself.
The true history of a people is written in the margins of official history.
Failure is just a stepping stone to success.
The true value of a forest is measured not in board feet, but in biodiversity.
The historian is a prophet looking backwards.
数学的研究就像空气或重力——它无处不在,你看不到它,但你知道它在那里。