—— 请按键盘 空白键 开始游戏 ——

In economics, small changes in rules can lead to large changes in outcomes.
The difference between perseverance and obstinacy is that one comes from a strong will, and the other from a strong won’t.
The forest doesn't need us, but we need the forest—this truth should guide every decision we make in forestry.
在数学中,旅程和目的地同样重要,因为正是通过发现的过程,我们才能真正学习。