—— 请按键盘 空白键 开始游戏 ——

一个过于关注人群事务的人,就像过于好奇地观察蜜蜂劳动的人一样,往往会因为好奇心而被蜇伤。
Reinforcement is the central factor in the acquisition of new behavior patterns.
Every mental state exists for a purpose; to understand it, we must ask what function it serves in the broader system of behavior.