现在的天空中两个亮一些的飞船分别是国际空间站(ISS)，以及轨道高一些的NASA的航天飞机。
Two of the brighter spacecraft in the present day sky are the International space Station (ISS), and, when it is up, a NASA space shuttle.
而且，连接到空间站的航天飞机做了非常精彩的“表演”，它缓慢的绕轨道旋转着。
And the linked station-shuttle did what any good fashion model does. It slowly turned and pivoted on its orbital runway.
哥伦比亚号航空航天飞机是美国航天局轨道船队第一个有价值的空间航天飞机。
The space shuttle Columbia was the first space worthy shuttle in NASA 's orbital fleet.
周日，“发现号”轨道的工作人员在跟国际空间——，必须先确保飞机的隔热板在起飞时没有损坏。
The orbiting Discovery crew on the way Sunday to rewire the International Space Station first had to make sure the shuttle's heat shield (heatshield) wasn't damaged during lift-off.
原计划要求建立一航天飞机机群以及同时建一个轨道空间站。
The original plan called for building a shuttle fleet and an orbiting space station at the same time.
用航天飞机将科学装备送往轨道空间站。
管理人员们然后需要筹划奋进号的升空，使得这架航天飞机在轨道上的运动不与俄国的联盟号运载火箭相冲突，推测它要在本月晚些时候离开空间站。
Managers need then to stage Endeavour's ascent so that the shuttle's movements in orbit do not conflict with a Russian Soyuz vehicle that is supposed to be leaving the space station later this month.
“空间发射倡议”在去年被分为两部分：一部分聚焦于未来的发射装置，另一部分则着力于轨道航天飞机。
The project, known as the Space Launch Initiative, was divided last year into two parts – one focusing on a future launch vehicle , the other on a space station orbiter.
他们发现，使用液体助推器可大大提高航天飞机的安全性，并使其低地轨道和空间站轨道有效载荷能力分别提高36%和50%。
What they have found is that the Shuttle using a liquid booster could be much safer and could carry 36% more payload to low Eeath orbit and 50% to space station orbit.
他们发现，使用液体助推器可大大提高航天飞机的安全性，并使其低地轨道和空间站轨道有效载荷能力分别提高36%和50%。
What they have found is that the Shuttle using a liquid booster could be much safer and could carry 36% more payload to low Eeath orbit and 50% to space station orbit.
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