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。
As I taxi out to the end of the runway, I am on the radio with my safety observer to confirm that the jet is good to go and that I am on time.
在我滑行到跑道尽头时，我用无线电与我的安全观察员联系确认飞机的起飞状态和我的起飞时间。
As I taxi out to the end of the runway, I am on the radio with my safety observer to confirm that the jet is good to go and that I am on time.
在我滑行到跑道尽头时，我用无线电与我的安全观察员联系确认飞机的起飞状态和我的起飞时间。
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