And just like we saw before for the case of entropy in an isolated system, now we have something we can calculate.

就像我们前面看到的,孤立系统的熵一样，现在我们有一些可以计算的东西。

麻省理工公开课 - 热力学与动力学课程节选

Huh, all right. Well, there's some Indians here, but I guess we could set up camp, hang out.

哈，好吧，这儿有一些印第安人，但我想我们可以扎营，到处看看。

向哥伦布学习 - SpeakingMax英语口语达人

This is why people right tables and tables of H delta H's. Why you have delta H's from all these reactions, because this is basically the heat and the heat is something we can measure, we can control. We can figure out how much heat is going in and out of something.

这就是为什么人们一再提出ΔH的原因,为什么在所有的反应中你都能看到Δ,因为它就是热量，而且热量,是一种我们可以测量并且控制的东西，我们可以测量出有多少热量,从一些东西里面放出或被吸收。

麻省理工公开课 - 热力学与动力学课程节选

And I picked looking at methane so we could see if there are other factors that we're not considering, that we need to maybe tweak our model a little bit, and I think we'll find that we do if we take a look at a polyatomic molecule, methane, CH4 so c h 4.

我选择甲烷这个例子，我们可以看到,如果有一些我们没有考虑到的因素，我们需要修改一下我们的模型，我们看一看,甲烷CH4这个多原子分子，就会知道这一点，甲烷。

麻省理工公开课 - 化学原理课程节选