Recruits spent 54 weeks on shuttle systems during their two-year basic training, Ross says.

罗斯说，新招募的成员在为期两年的基础训练中，需要花54周在航天飞机系统上。

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When VietNamNet's reporters spent ten days' under cover 'working in an industrial zone (IZ) near HCM City, almost all the workers they met did little but shuttle between factory and boarding house.

VietNamNet的记者隐藏身份在胡志明市附近的工业区工作了十天，期间，几乎所有的工人除了穿梭往来于工厂和木板屋。

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Astronauts work long hours and most of their time is spent on a day job that has nothing to do with flying the shuttle - for example, an assignment to help update the design of the shuttle cockpit.

宇航员工作时间长，他们的大多数时间都花在与驾驶航天飞机没有任何关系的日常工作中。例如，帮助更新航天飞机驾驶员座舱的设计任务等。

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It said that, although Nasa was taking steps to protect the shuttle from orbital debris such as spent rocket bodies, satellite fragments and paint chips - there was a real risk that a collision could cripple the shuttle or threaten the safety of the crew.

BBC: Was Columbia struck by space debris?

We spent an entire day in the shuttle simulator, as the crew executed the duties closely mirroring the reality of a NASA mission.

FORBES: Space Shuttles and Motorcycles

The past couple of years, most of that has been spent on fixing problems with the shuttle and getting ready to launch it again.

NPR: Is the Space Shuttle Worth the Effort?