Just to drive home one more reason why I don't want to have changes to the values other than through pre-defined things.

注意如果我这么做的话会发生什么,我可以说我想要改变,某个特定点的半径。

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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。

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