Until recently most astronomers believed that the space between the galaxies in our universe was a near-perfect vacuum.

直到最近，大多数天文学家都认为我们宇宙中星系之间的空间是近乎完美的真空。

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But low-Earth orbit isn't a perfect vacuum.

但近地球轨道不是一个完美的的真空。

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Combined with our Vacuum Chambers and Central Filter Units we can create the perfect system for you.

真空室和中央过滤装置结合，可以为您创建完美的系统。

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Among a host of other developmental problems, EUV must operate in a nearly perfect vacuum.

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We were operating in a near perfect vacuum with the temperature well above 200 degrees Fahrenheit with the local gravity only one sixth that of Earth.

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She had trained for enough emergencies to know that beneath almost every sort of raging anxiety there was a calm pocket, a perfect little vacuum in which both thoughts and actions were crisp and clear.

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