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When we finish, ISS will be a premier, world-class laboratory in low Earth orbit.

当我们完成时，国际空间站将成为近地轨道上一流的世界级实验室。

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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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This meant the Apollo Eight astronauts could fire the rocket that would send them from Earth orbit toward the moon.

VOA: special.2009.07.08

In nineteen fifty-seven, a Soviet military rocket carried a small satellite into Earth orbit.

VOA: special.2009.06.10

The number of man-made objects in Earth orbit has been growing each year.

VOA: special.2009.04.01

Most see a greater role for the private sector in launching astronauts to low-Earth orbit.

BBC: Underfunding shackles Nasa vision

The other study would look at new low-Earth orbit applications for an ATV-derived vehicle.

BBC: Europe ponders future of ATV space truck

No longer will it own the vehicles it uses to go to low-Earth orbit.

BBC: Shuttle Endeavour launches one last time