The total energy of the system, which we are going to get from postulate number four, which says the energy of the electron, which is the energy of the system, is the sum of the kinetic and the potential energy.

这个系统的总能量，也就是我们将从第四个假设中算出的能量，也就是电子运动产生的能量，也就是整个系统的能量，是动能和位能的总和。

麻省理工公开课 - 固态化学导论课程节选

You're always wasting energy into heat somewhere when you dochange that involves mechanical change.

当进行与机械运动有关的变化时,总会有能量变成热量而被浪费掉。

麻省理工公开课 - 热力学与动力学课程节选

Particle's moving, it's got some energy and that's it.

粒子运动,获得能量,就是这样

耶鲁公开课 - 基础物理课程节选