解释：树立品德，莫如日积月累，不懈怠地培植；治疗疾病，莫如彻底消除，不留下任何病根。

To understand behavior, we must look at its purpose in the context of survival and adaptation.

The probability of a response is determined by its reinforcement history.

科学中最激动人心的短语，预示着新发现的不是“我找到了！”而是“这有点奇怪……”