—— 请按键盘 空白键 开始游戏 ——

The worst of all deceptions is self-deception.
Prices are important not because money is considered paramount but because prices are a fast and effective conveyor of information through a vast society in which fragmented knowledge must be coordinated.
每个数学问题都有一个解决方案;你只需要找到正确的视角。
The coal industry is about people, not just profits.
Sustainability isn't a choice anymore—it's a responsibility we owe to future generations.
The Internet is a place for collaboration, but it also requires trust.