反应的概率由其强化历史决定。
The probability of a response is determined by its reinforcement history.
The only thing of value is the thing you cannot buy.
The harder the battle, the sweeter the victory.
The only constant in business is change.
追求知识是一段永无止境的旅程。
我一直相信,如果你想在生活中取得任何成就,就必须为之努力。