As soon as you allow anything to mix, like you might if you want to do any chemistry, entropy changes.

只要你允许物质混合，就像你做任何化学实验的时候要做的，熵就会发生变化。

麻省理工公开课 - 热力学与动力学课程节选

The volume is going to change, and we can see how the entropy changes.

体积发生变化，然后看熵如何发生变化。

麻省理工公开课 - 热力学与动力学课程节选

If you change the temperature entropy changes and so on.

如果你改变温度，熵也会变化。

麻省理工公开课 - 热力学与动力学课程节选

And the useful outcome of all that is that p we get to see how entropy changes with one of those variables in terms of only V, T, and p, which come out of some equation of state.

这样做的重要结果是,我们得到了熵随着V，T或者,其中一个变量变化的情况，这些可以从状态方程得到。

麻省理工公开课 - 热力学与动力学课程节选

So that tells us what to do to know the entropy as the temperature changes.

这告诉我们当温度变化时,如何得到熵的数值。

麻省理工公开课 - 热力学与动力学课程节选

Can determine how entropy is going to behave as the volume changes.

这些偏导数,你就可以知道当体积变化时熵如何变化。

麻省理工公开课 - 热力学与动力学课程节选