controlled flight into terrain (cfit) meaning in English

操控下撞地

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。
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。