Another source of bright drifting objects, Iridium communication satellites, may even appear to flare up to become brighter than any other sky object for a few seconds.
铱星通讯卫星是另一个发光漂移物的可能来源，它可能突然闪耀几秒钟，甚至看起来变得比天空中的其它物体都要亮。
An unmanned free balloon shall refer to a freely drifting inflatable object which is driven with no power, is piloted by nobody, is lighter than air, and whose gross mass is more than 4 kilograms.
无人驾驶自由气球，是指无动力驱动、无人操纵、轻于空气、总质量大于4千克自由漂移的充气物体。
Presently a dark object was seen in the river, drifting towards us.
不多一会儿，只见河上有个黑不溜秋的玩意儿在向我们漂来。
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