—— 请按键盘 空白键 开始游戏 ——

Certification is not the destination; it's the starting point of responsible forestry.
Humans are allergic to change. They love to say, 'We've always done it this way.' I try to fight that. That's why I have a clock on my wall that runs counter-clockwise.
我不喜欢做简单的事,我喜欢接受挑战。
Mathematics is the language in which the gods talk to people.
唯一真正的智慧是知道你一无所知。
The beauty of instrumental variables is that they allow us to see the world in a new light.