We use the concept of conservation of states and the Aufbau Principle.

我们利用该状态的概念,和构造原理。

麻省理工公开课 - 固态化学导论课程节选

Our bodies have mechanisms like that, that mainly use the principle of negative feedback in order to control the parameters that are important for life within a certain range.

我们的身体有着与之类似的机制,主要依靠负反馈原理来,将与生命息息相关的指标控制在一定范围

耶鲁公开课 - 生物医学工程探索课程节选