他们一天两次通过无线电通信系统与反叛者领导人保持联系。
They are in twice daily radio contact with the rebel leader.
作为职责，排长不断通过无线电与同事们保持联系。
As he should, the platoon leader keeps in constant radio touch with colleagues.
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.
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