这架航天飞机是世界上第一艘真正的宇宙飞船，它是为了人类的利益和生存而把不可能变为可能的伟大一步。

The space shuttle, the world's first true spaceship, is a magnificent step in making the impossible possible for the benefit and survival of man.

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这很关键，因为当航天飞机退役后，2010到2014年之间，美国只能依靠俄国的宇宙飞船抵达国际空间站。

This is critical since the us will depend on Russian spacecraft to reach the International space Station from 2010 to 2014, when the shuttles are decommissioned.

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虽然两个传统的航天竞争对手美国和俄罗斯发射的宇宙飞船多于任何其他国家，但许多小竞争对手正在紧追其后。

Although America and Russia, the traditional space-race adversaries, have launched more spacecraft than any other countries, a slew of smaller players are nipping at their heels.

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