Researchers at the University of Toronto in Canada are studying a mobile phone system that may help people with diabetes control their blood pressure.

VOA: special.2010.12.06

Let's imagine maybe instead we just immediately dropped the pressure let the system expand against the lower pressure.

现在假设,我们很快地降低压力,让系统在低的外压力下膨胀。

麻省理工公开课 - 热力学与动力学课程节选

There's a volume, there's a temperature, than the pressure here. There's other volume, temperature and pressure here, corresponding to this system here.

温度等状态函数有本质区别，这个状态有一组，确定的体积，温度与压强。

麻省理工公开课 - 热力学与动力学课程节选

But these immigration reform activists say they will not be deterred and will continue to rally to pressure the White House and Congress to overhaul the nation's immigration system.

VOA: standard.2010.04.12

As it does that it changes the volume of the heart and gives the - creates the pressure that moves blood around your body, so it has that muscular system.

这使心脏的体积发生变化,产生了足以使血液流遍全身的压力,这就是心脏中有肌肉系统的原因

耶鲁公开课 - 生物医学工程探索课程节选

Since the financial crisis began in the United States (in 2007), US officials are under pressure to assure their counterparts that they are taking decisive action to safeguard and repair the banking system.

VOA: standard.2009.04.24

Because if it's irreversible, it's very likely that I don't know what the pressure inside the system is doing while this is happening.

因为对不可逆过程，系统内部的压强,没有明确的定义,气体不处于平衡态。

麻省理工公开课 - 热力学与动力学课程节选

You just need a few macroscopic variables that are very familiar to you, like the pressure, the temperature, the volume, the number of moles of each component, the mass of the system.

你只需要某些你非常熟悉的宏观变量,比如压强，温度，体积，每个组分的摩尔数，系统的质量。

麻省理工公开课 - 热力学与动力学课程节选

I mean maybe up the street we whisper, but here we know it. And, so here is a different kind of system where we have a constant external pressure.

或许在街上你们低声细语，但在这里不应该这样，这是另一个系统,我们有一个恒定的外压强。

麻省理工公开课 - 热力学与动力学课程节选

The pressure could not be, might not even be constant throughout the system.

很可能气体各处的压强,都不相同。

麻省理工公开课 - 热力学与动力学课程节选

This is the internal pressure of the system.

这是内部压强。

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

It's the pressure the external world is applying on this poor system here.

V是气体初态和,末态的体积之差。

麻省理工公开课 - 热力学与动力学课程节选