Hot weather also increases dangers for people who must take medicine for high blood pressure,poor blood flow, nervousness or depression.

VOA: special.2010.07.27

Because so much of what we do in chemistry does take place with constant temperature and pressure.

因为化学中我们所做的很多东西,都是在恒定的温度和压强下进行的。

麻省理工公开课 - 热力学与动力学课程节选

It's going to take place in there. It's going to be a constant pressure, it might be open to the air, or even if it isn't, there might be plenty of room, and it's a liquid anyway, so the pressure isn't going to change significantly.

也许它是液体，它在这个位置,这是恒压的，它也许是连通大气的，就算不是，它也有，足够的空间，而它是液体,压强不会显著地改变。

麻省理工公开课 - 热力学与动力学课程节选

"And as Iran makes choices that seem to indicate that it is not at this stage ready and willing to take up the offers on the engagement track, then we will put greater emphasis on the pressure track.

VOA: standard.2009.11.30

to take my cylinder now, and the external pressure and the internal pressure are not going to be I'm going to start with my cylinder here, I'm going to put little pegs here so it doesn't fly up.

活塞内外的，压强不相等,我们在,放上插销，以防止活塞。

麻省理工公开课 - 热力学与动力学课程节选

I take V1 to V2 first, keeping the pressure constant at p1, then I take p1 to p2 keeping the volume constant V2 at V2. Let's call this path 1.

容易计算的路径，第一条路径，是首先保持压强不变,体积从V1压缩到。

麻省理工公开课 - 热力学与动力学课程节选

Let's take a system. Under constant pressure T1 V1, going to a second -- this is the system, so let me write the system here.

我们建立一个系统1,在恒定的压强T1，V1，下，变成了另一个系统，-这个初始的系统让我把它写在这。

麻省理工公开课 - 热力学与动力学课程节选