It's just humans tend to live " in a richer environment than rats."

只不过相较于老鼠,人类生活在刺激更加丰富的环境中罢了“

耶鲁公开课 - 心理学导论课程节选

The main function of all your cells, and all your tissues, and all your organs is to maintain this homeostasis, which allows you to live in a changing environment.

你所有细胞,所有的组织,所有的器官最主要的功能,就是维护这个内稳态,使你能够以不变应万变

耶鲁公开课 - 生物医学工程探索课程节选