One or two cases, maybe just one actually, where I've got more than one article by the given author, I've given the title of the article as well.

一种或两种情况，也许实际只有一种，我不止找到该作者一篇文章，我也会给出文章的标题。

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So there's p v work and it's given by the integral minus p external dv or just the integral from one to two of dw.

我们知道对于pv系统来说,功w可以写成黑板上的两种不同形式。

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