而有些卫星则装配了火箭发动机和推进剂贮箱，这样可以控制它们的坠落路线，将其引导坠落到海洋之中，而不是坠落到居民区里。

Some satellites come equipped with a rocket engine and propellant tank so controllers can aim their descent into an ocean instead of a neighborhood, but not all.

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通讯——集音频引导与卫星跟踪技术于一身的新型装置让游客可以随心所欲地游览城市。

Communications: New gizmos that combine audio guides with satellite tracking let tourists explore cities at their own pace.

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在最粗糙的情况下，任何物体只要被引导到某枚卫星的轨道上，都能成为一件太空武器。

In its crudest form, any object can become a space weapon if directed into the path of a satellite.

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