controlled flight into terrain meaning in English

（委婉语）有控制地向地面飞行，只有优秀的飞行员驾驶的良好飞机的失事

The serious incident is officially classified in international aviation terms as " controlled flight into terrain only marginally avoided "
国际航空术语把这种严重事件正式归类为“控制中的飞机进入只能险险避开的地带” 。
With the improvement of aviation technology , the controlled flight into terrain ( cfit ) accidents / instances result from human factor has become the main cause result in the air disaster
随着航空设备技术水平迅速提高，人为因素造成的可控飞行撞地cfit已经成为商用飞机机毁人亡的主要原因。
However , he emphasised the strict official definition set down for such an incident by the international civil aviation organization ( icao ) is " controlled flight into terrain only marginally avoided "
不过他强调了国际民航组织规定此类事故的严格的正式定义是“控制中的飞机进入只能险险避开的地带” 。
The flight safety is the permanent topic in the field of civil aviation . in order to prevent the controlled flight into terrain ( cfit ) accidents / instances from occurring , the aviation field studied the principles and equipments to avoid cfits
飞行安全是民航永恒的主题，可控飞行撞地和空中相撞是影响飞行安全的主要因素。为了减少可控飞行撞地和空中相撞的危险，航空界不断地进行了防撞理论和防撞设备的研究。