在400公里高的轨道上，不推进的话，卫星的轨道寿命通常是几个月，200公里高度的轨道寿命是几周。
At 400 kilometers, orbital lifetimes are usually measured in a few months without re-boost. At 200 kilometers this drops to a few weeks.
在400公里高的轨道上，不推进的话，卫星的轨道寿命通常是几个月，200公里高度的轨道寿命是几周。
At 400 kilometers, orbital lifetimes are usually measured in a few months without re-boost. At 200 kilometers this drops to a few weeks.
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