In the report it was disclosed that neither pilot nor controller had any experience of the radar system in use at the time of the crash.报告披露，在撞机事故发生时，飞行员和调度员对正在使用的雷达系统都没有任何经验。Using powerful lasers, the device can incapacitate enemy radar systems.这种装置使用了强大的激光，能破坏敌人的雷达系统。The new radar system is an important part of the country's defences.这个新的雷达系统是该国国防的重要组成部分。