这次飞行的目的是为了测试新的航天飞机系统能否安全的进入轨道和安全的返回地球着陆。

The aim of this flight was to test the new shuttle system, to go safely up into orbit and to return to the Earth for a safe landing.

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美国“发现”号航天飞机回到肯尼迪航天中心之前，佛罗里达恶劣的天气，加上舱门的故障，曾使安全着陆难以保证。

Before the American space shuttle Discovery returned to the Kennedy space Center, the bad weather in Florida, coupled with the door trouble, put its safe landing in doubt.

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航天飞机在精确地做了了一系列的转弯和倾斜动作之后在肯尼迪航天中心3英里(4.8公里)长的跑道上以较低的速度安全着陆。

They then precisely executed a series of turns and banking maneuvers that slowed the vehicle for its landing on a 3-mile (4.8 kilometer) long runway at the Kennedy Space Center.

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