—— 请按键盘 空白键 开始游戏 ——

Natural experiments are a powerful tool for understanding causal relationships in the real world.
痛苦是暂时的,但音乐是永恒的。
如果你不参与,你就无法获胜。
Semiconductors are the food of the information society; without them, modern information technology would not exist.
生活是世界上最为罕见的事情。大多数人只是存在,仅此而已。
I think the most important thing in life is to be able to look at yourself in the mirror and feel good about who you are.