That makes perfect sense. And we're 7 back to where we're there, minus 2 and 7.

道理不用再说,我们回到这里，-2和。

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Minus p, right? But in fact, if you go back to the van der Waal's equation of state b here's RT over v minus b.

再减去p，对吗，但是实际上，如果你代回范德瓦尔斯气体的状态方程,这里是RT除以摩尔体积减去。

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