—— 请按键盘 空白键 开始游戏 ——

I want to stand as close to the edge as I can without going over. Out on the edge you see all kinds of things you can't see from the center.
挑战不仅仅是给人们钱,而是要理解他们在约束下如何做决策。
"History is not the past—it is the method we have evolved of organizing our ignorance of the past."
The selfish gene theory is not a theory about selfishness in the everyday sense. It is a theory about the evolution of behavior.