铱卫星通常轨道较低，其运动较快。
Iridium satellites are unusual because their orbit is so low and they move so fast.
在某些情况下，我们必须用铱卫星电话交流。
On some occasions, we would have to use Iridium satellite phones for communication.
依此思路推测，它有点像“铱闪光”，它是由太阳光反射到铱卫星上所产生。
In this way it would act like an 'iridium flare.' The flares are created by sunlight reflecting off iridium satellites.
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