Control of gene expression is a very big topic and so I'm going to show you one cartoon to sort of tell you that it is a big topic that's really important.

基因表达的调控是个大课题,我给你们放一些动画,好让你们理解,其涉及范围之广,意义之重

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In other words, the order of taking the derivatives with respect to pressure and temperature doesn't matter And what this will show is that dS/dp dS/dp at constant temperature, here we saw how entropy varies with volume, this is going to show us how it varies with pressure.

换句话说,对温度和压强的求导顺序无关紧要,结果会表明,恒定温度下的，对应我们上面看到的，熵如何随着体积变化，这个式子告诉我们，熵如何随着压强变化。

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