Unlike the Chinese test, though, the American target was in such a low orbit that any debris would quickly have fallen into the air and burned up.
然而有别于中国实验的是美国的目标卫星的飞行轨道较低,从而所产生的残骸会在落入大气层后迅速燃烧。
2
Yet the destruction of the Chinese Fengyun-1C in an anti-satellite missile testin 2007 accounts for more than a quarter of all catalogued objects in low-Earth orbit.
But two events in the past four years - a 2007 Chinese anti-satellite weapon test and a 2009 crash-in-orbit of two satellites - put so much new junk in space that everything changed, the report said.