We invoke Dalton's Law of molar proportions, we write it subject to conservation of mass.

我们援引了摩尔分数的道尔顿定律，要服从质量守恒定律。

麻省理工公开课 - 固态化学导论课程节选

We write it subject to conservation of mass.

要服从质量守恒定律。

麻省理工公开课 - 固态化学导论课程节选

All right, now what we're going to learn next time and Bob Field is going to teach the lecture next time, is how heat and work are related, and how they're really the same thing, and how they're related through the first law, through energy conservation.

这节课就到这里,下节课将由Bob，Field讲授,我们将学习功与热量的关系，认识到它们在本质上的相同之处，并通过热力学第一定律，亦即能量守恒定律，把它们联系起来。

麻省理工公开课 - 热力学与动力学课程节选