这种燃料在真空中不会产生火花。

The fuel used does not produce a flame in a vacuum.

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简言之，在真空中考虑技术是个错误。

It is a mistake, in short, to consider technology in a vacuum.

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在真空中，没有什么东西能比光跑得更快了。

Nothing can travel through a vacuum faster than light.

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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 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