其命名看得出来是源自类星体而两者间有些共同点：强烈且时变地无线电波放射，常表现成无线电波喷流(radio jet)，以及一个围绕黑洞地积气盘(accretion disk)。
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A spokesman said the search and rescue mission was mounted after the jet failed to make regular radio contact.
一名新闻发言人透露，搜救任务在飞机不能进行正常的无线电联络之后就已经开始了。
As the plane crossed state lines neither pilot realized the jet no longer was on the correct radio frequency and that controllers were growing worried about their failure to stay in contact.
飞机随后飞越了州界，两位飞行员都没有意识到飞机已经不在准确的无线电频率上，而地面塔台也对无法与飞机保持联系感到越来越担忧。
This chain eventually led to jet aircraft, nuclear power, and giant radio telescopes .
这一链条后来导致了喷气式飞机，原子能和巨型射电望远镜的发明。
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