radio acoustic ranging

例句：

1. 1. The aircraft'sradio acoustic ranging system is used to detectthe distance between the aircraft and the ground.
   飞机的无线电声纳测距系统用于探测飞机与地面之间的距离。
2. 2. The sonarranging equipment was designed to provide accurate rangereadings for the military.
   声纳测距设备被设计为为军事提供准确的距离读数。
3. 3. The radar system uses radioacoustic ranging to track enemy aircraft in theairspace.
   雷达系统使用无线电声纳测距来跟踪空中敌机。