In one study,infected mothers began to take three anti-H.I.V.drugs while breastfeeding for up to six months.

VOA: special.2009.07.29

So if I take p times V to the gamma, anywhere on the path, it's going to be equal to the same relation This is going to be true for any point on the path.

结果都，将等于，初态点的,只要在这条路径上。

麻省理工公开课 - 热力学与动力学课程节选

pV=RT p plus a over v bar squared times v bar minus b equals r t. All right if you take a equal to zero, these are the two parameters, a and b. If you take those two equal to zero you have p v is equal to r t.

我们就回到,也就是理想气体,状态方程,下面我们来看看,这个方程。

麻省理工公开课 - 热力学与动力学课程节选

Now, I hope you guys know that much calculus, that when you take a derivative of a function of a function, namely v square over 2 is a function of v, and v itself is a function of t, then the rule for taking the derivative is first take the v derivative of this object, then take the d by dt of t, which is this one.

我希望你们了解更多的微积分知识,当你对复合函数求导时,也就是说v^/2是关于v的函数,而v本身是关于t的函数,求导的法则应该是,第一步是这一部分对v求导,然后v再对t求导,得到这一部分

耶鲁公开课 - 基础物理课程节选

Then you take p1 to p2 with V constant.

图上画出来就是这样。

麻省理工公开课 - 热力学与动力学课程节选

OK, so now we can take the result from this and put it onto a p v diagram.

好，现在我们有了结论,把它画进pv图。

麻省理工公开课 - 热力学与动力学课程节选