It is because of the heroism, the calm under pressure,the grace with which these three gentlemen operated, but also the entire NASA family that was able to, at great risk oftentimes and with great danger, was somehow able to lift our sights not just here in the United States, but around the world,"

VOA: standard.2009.07.20

so we know how to do this, and we know this thing when it hit these stops, v2 the pressure with p2, and the volume was V2.

所以我们知道怎么计算，当活塞到达这两个挡板时，压强是p2，体积是。

麻省理工公开课 - 热力学与动力学课程节选