I mean we can, we can sort of understand why OK, the total energy, if we measure it, we measure a process which is not reversible.
例如我们易于理解为什么,当试图测量一个不可逆系统的总能量,给出的或许。
If we want to know the total heat added to the system, we can measure it, which is the straightforward thing, but sometimes you want to calculate in advance, or sometimes you want to calculate it on an exam.
如果想知道给系统的总热量,我们可以测量,这是很直接的事情,但有时候我们想事先计算它,或者需要在考试中计算。
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