Once in orbital space, where repulsorlifts become ineffective, a ship switches to its more powerful sublight drives.

一旦进入反重力装置失效的轨道空间，飞船才切换到更强大的亚光速推进器。

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The habitable zone refers to the orbital space around the star that's not so close to the star that the planets surface would boil.

适合居住的地带指恒星周围的轨道空间，不会因离恒星太近而导致行星表面处于沸腾状态。

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The model Bigelow Orbital Space Complex arrives from Las Vegas at the Theobald's Road Space Centre, London, in a giant orange flight case.

毕格罗轨道空间站合成模型从拉斯维加斯专程送来。 模型是在伦敦奥巴德路（Theobald's Road）的太空中心制造而成的，装在一个巨大的橙色航空护运箱中。

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The results of the two short flights made space officials believe the Mercury program was ready for its first orbital flight.

VOA: special.2009.06.17

Nicholas Johnson is chief scientist for orbital debris for the United States space agency.

VOA: special.2009.04.01

Sierra Nevada Space Systems showed video of a successful flight of their Dream Catcher orbital space vehicle this year.

FORBES: Private Space Transportation Reaching New Heights

The agency has already spent billions of dollars on the National Aerospace Plane, the X-33, X-34, X-37, X-38 and the Orbital Space Plane.

FORBES: Magazine Article

Latest example of NASA bloated spending: The agency has already spent billions of dollars on the National Aerospace Plane, the X-33, X-34, X-37, X-38 and the Orbital Space Plane.

FORBES: Magazine Article