NASA also would like to make a final servicing call to the Hubble Space Telescope and fly two resupply flights to the station before the end of the shuttle program.

美国航空航天局同时计划最后访问一次哈勃太空望远镜，在航天飞机退役前进行两次空天飞行，对哈勃太空望远镜的太空站进行补给。

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During 12 days at the station, the shuttle astronauts performed five spacewalks, a number previously seen only during Hubble space Telescope servicing missions.

在太空站上的12天期间，航天飞机的宇航员们完成了五次太空行走，以前看到的一些仅仅是在哈勃太空望远镜的维修任务过程中。

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Because Atlantis will not be able to reach the space station if it gets into trouble, or is damaged, on its Hubble flight, the Endeavour orbiter will be made ready on the pad for a rescue mission in case it is needed.

BBC: NEWS | Science/Nature | Endeavour launched from Florida