Or, if we know the equation of state from a model, ideal gas, van der Waal's gas, whatever, u now we can determine u.
或者如果我们知道模型的状态方程,比如理想气体,范德瓦尔斯气体,无论什么,我们就可以利用状态方程得到内能。
So in the time of declining resources, we might look what we were doing with what we get in return for it.
在资源逐渐枯竭的时刻,倒是可以看看我们的付出到底得到了什么。
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