就在地面塔台正在指示飞行员转向另外一个无线电通话频率时，这位空服人员呆在驾驶舱短暂聊了会儿。
The flight attendant stayed inside the cockpit for a brief chat just as controllers were instructing the crew to switch to another radio frequency.
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。
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.
为什么像进近，塔台，地面这种频率在某些机场没有分开为几个个频率？
Why aren't the frequencies like approach, tower, and ground separated on some airports?
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