—— 请按键盘 空白键 开始游戏 ——

Sustainability isn't a buzzword; it's a business imperative.
We change our behavior when the pain of staying the same becomes greater than the pain of changing.
The truth is, I don't know what I would have done without mathematics.
最好的学习方法就是动手去做——在实验室里亲自动手。