火箭成功的将一枚勘测卫星送入地球低轨道。
The rocket successfully lifted a reconnaissance satellite to low Earth orbit.
由于地球低轨道更利于收集情报信息，大多被军事侦察卫星所占有。
The low earth orbit is mostly occupied by military reconnaissance satellites for it is convenient to collect intelligence information.
现在约有2万间太空垃圾在地球低轨道运行，其中大部分是航天器的分离部分或者碰撞残骸。
Some 20,000 pieces of rubbish are currently being monitored in low-Earth orbit, the majority of which are discarded bits of spacecraft or debris from collisions.
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