The Henry Milker is a hand-operated vacuum pump.

VOA: special.2010.07.20

This is titanium sponge that comes out of the bottom of this reactor, and it subsequently re-melted in a vacuum arc furnace.

海绵状的钛,从反应器的底部出来，随后在真空炉中重新熔炼。

麻省理工公开课 - 固态化学导论课程节选

And, in between, there is void, which is very similar to how we would describe vacuum.

而存在其中的，就是虚无了，那是与我们描述的真空很接近。

麻省理工公开课 - 固态化学导论课程节选

The module called Kibo or "Hope" in Japanese will allow astronauts to conduct experiments that involve exposing materials to the vacuum of space.

VOA: standard.2009.07.16

And so an experiment said the gas didn't increase its temperature when it expanded the vacuum.

这个实验告诉你,气体在向真空膨胀的过程,中温度没有升高。

麻省理工公开课 - 热力学与动力学课程节选

The hope is that it will not take too long, for fear a power vacuum could develop.

VOA: standard.2010.03.07

Then here's the favorite of all time, vacu-pants, attached via the hose to your vacuum cleaner.

这是最受喜欢的,真空裤法,需要与真空吸尘器的管子相连

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Because of the oil-rich bran layer, it spoils quickly if not refrigerated or stored in vacuum-sealed bags.

VOA: standard.2010.06.25

What we need to do is get rid of the Coulomb tag that we have - that's how we measure our electron charges - charge, and so we use this epsilon nought quite often, this permativity constant of a vacuum to make that conversion.

怎么量度电子电荷,所以我们会经常用到,这个epsilon，nought记号,这是真空中的介电常数,我们还要指出,这个介电常数。

麻省理工公开课 - 化学原理课程节选

The power vacuum is likely to continue for some time. Election resultsmust be finalized before a government can be formed, the vote is being recounted.

VOA: standard.2010.05.10

And so we have gas and we have vacuum.

这边是气体，这边是真空。

麻省理工公开课 - 热力学与动力学课程节选

He says the move will both prevent a power vacuum and respect the constitution.

VOA: standard.2009.03.29

There is the permittivity vacuum. It is all up there.

这儿还有真空中的介电常数，看，全在这里。

麻省理工公开课 - 固态化学导论课程节选

The politicians internal divisions have led to fears that a political vacuum could give Sunni militants a chance to revive the sectarian violence that roiled the nation in 2006 and 2007.

VOA: standard.2010.04.04

I'm going to create a vacuum.

我创造了真空。

麻省理工公开课 - 热力学与动力学课程节选

Yes,we have indeed a certain timetable for (U.S.) withdrawal from the population centers, from the city-centers, but we are doing our utmost and we are coordinating very closely with the multinational forces to ensure there is no vacuum,".

VOA: standard.2009.04.25

When you expand a real gas into vacuum, the temperature goes down.

当一个真实气体，向真空膨胀咱的时候温度会下降。

麻省理工公开课 - 热力学与动力学课程节选

well since the gas is expanding into vacuum no work is done.

因为气体是向真空膨胀,因此这个过程不做功。

麻省理工公开课 - 热力学与动力学课程节选

In addition to that, we have that epsilon nought value, remember that's the permittivity constant in a vacuum, and basically that is what we use as a conversion factor to get from units. We don't want namely coulombs to units, we want that will allow us to cancel out in this equation.

这是电子的电荷，此外，我们有epsilon零，记住这是真空的介电常数，这是我们用来转换单位的转换常数,我们不想用库伦单位，我们希望这个可以在方程中约去它。

麻省理工公开课 - 化学原理课程节选

This is the permittivity of vacuum.

真空中的介电常数是。

麻省理工公开课 - 固态化学导论课程节选

Epsilon zero is the permittivity of vacuum.

0是真空中的介电常数。

麻省理工公开课 - 固态化学导论课程节选

In other words, this is vacuum.

换句话说，这是真空。

麻省理工公开课 - 热力学与动力学课程节选