One reason is that heat from the sun can go through many of the building materials commonly found in cities.

VOA: special.2010.03.02

It either had work, got its heat from the surroundings, or it got worked on by the surroundings.

系统从环境中，得到热量。

麻省理工公开课 - 热力学与动力学课程节选

We know it has to big anyway, since we can extract heat from it without changing the temperature.

我们知道它必须很大，因为我们得从中提取热量,但不改变它的温度。

麻省理工公开课 - 热力学与动力学课程节选

Carbon dioxide and other gases in the atmosphere trap heat from the sun.

VOA: special.2010.01.19

And we had the similar statement by Kelvin about the heat engine that required that some heat gets dumped into a cold reservoir in the process of converting the heat from the hot reservoir into work.

相同的陈述,同样的有开尔文表述：,把热量完全从高温热源,转移至低温热源的过程中,必然有功的输出。

麻省理工公开课 - 热力学与动力学课程节选

Light and heat from the sun can change chemicals in the skin.

VOA: special.2010.07.06

The whole thing is being powered by sending heat from the hot to the cold reservoir.

所要做的所有事情,就是把热量从高温热源输送到低温热源。

麻省理工公开课 - 热力学与动力学课程节选

Experts say heat waves often become dangerous when the nighttime temperature does not drop much from the highest daytime temperature.

VOA: special.2010.07.27

So the expansion against lower pressure draws less heat from the hot reservoir right.

所以压强较低时的膨胀,从高温热源吸收的热量更少。

麻省理工公开课 - 热力学与动力学课程节选

The flight tested the heat shield. The shield protected the spacecraft from the great heat produced when it returned through the Earth's atmosphere.

VOA: special.2009.06.10

You couldn't just run something successfully in a cycle and get work out of it, using the heat from the hot reservoir, without also converting some of the heat that came in to heat that would flow into a cold reservoir.

如果一样东西在循环工作过程中,只有热从高温热源中流出，而没有热流入低温热源，那么此过程,不可能对外做功,不可能把所有热。

麻省理工公开课 - 热力学与动力学课程节选

This could be a serious problem. The shield protected the spacecraft from burning up from the extreme heat of re-entering the Earth's atmosphere.

VOA: special.2009.06.17

And these verbal descriptions lead to some pictures that I put up and I'll put up again about how you might try to accomplish something like run an engine or move heat from a colder to a warmer body.

这些言语的描述有助于你们理解我讲过的,而且还要再讲的一些物理图像,比如一台发动机,是怎么运行的,或热怎样从冷的物体传到热的物体。

麻省理工公开课 - 热力学与动力学课程节选

Doctors say people can do many things to protect themselves from the dangers of extreme heat.

VOA: special.2010.07.27

It's taking heat from the hot reservoir.

从高温热源吸取热量。

麻省理工公开课 - 热力学与动力学课程节选

No-till keeps carbon in the soil and avoids the release of heat-trapping gases from motorized equipment.

VOA: special.2010.09.28

But this is a compound, right, it has some non-zero heat of formation from the elements. So is water, right?

但这是种化合物，对吧？,它具有非零的生成热,水也是一样，对吧？

麻省理工公开课 - 热力学与动力学课程节选

Fruits and vegetables must be cool from field heat, before they are put into storage.

VOA: special.2009.11.30

Adiabatic meaning there's no heat involved, and we're going to see how that differs from the isothermal expansion and compression.

绝热意味着没有热量的传递，我们将看到它,与等温过程的区别。

麻省理工公开课 - 热力学与动力学课程节选

That involves preventing industrial gases from escaping into the atmosphere where they can trap heat.

VOA: special.2009.11.21

a You know that what will happen is that heat will flow from a to b from b to c and from a to c. That's common-sense.

你知道会发生的是热量从流向,从流向,以及从流向。

麻省理工公开课 - 热力学与动力学课程节选

Solar water heaters are devices that use energy from the sun to heat water.

VOA: special.2009.04.20

get back to the initial point is going to require some input from outside, like heat or extra work or extra heat or something because you've done an irreversible process.

如果要逆转它,回到初始点，就需要外界的投入，比如额外的功，额外的热量等等,因为你进行了一个不可逆过程。

麻省理工公开课 - 热力学与动力学课程节选

The desert sand around the well had melted into glass from the extreme heat.

VOA: special.2009.03.22

You take the third one, and you go from one to the other, and you see whether heat flows, when you touch one object, the middle object, between those two objects.

第三个物体就可以作为温度计,将它与第一个物体接触，再与第二个物体接触，观察它们之间热量流动的方向。

麻省理工公开课 - 热力学与动力学课程节选

A person suffering from heat exhaustion loses too much water through perspiration.

VOA: special.2010.07.27

So we're just subtracting, in effect, zero, right, from the enthalpy of the product, but of course it's important have that established because the heat of formation is something you could measure, right?

所以从效果上说，我们只是，从生成物的焓中减去了零，但，是确立这一点很重要,因为生成热是,你能测量的东西，对吧？

麻省理工公开课 - 热力学与动力学课程节选

Some people face an increased danger from heat stress.

VOA: special.2010.07.27

There's no heat flowing from the environment to the system. I have to define my terms.

系统与外界间,并没有热传递发生。

麻省理工公开课 - 热力学与动力学课程节选

You know the heat isn't going to flow from a cold body to a hot body without putting some work in to make that happen.

大家知道热量不会自发地,从冷的物理流动到热的物理,除非对它做功。

麻省理工公开课 - 热力学与动力学课程节选