Physically, the radar set is a group of metal boxes full of advanced circuitry, plus an indicator unit that displays the radar picture, Plus an antenna that usually revolves or scans in some manner.

• 看起来雷达装置只是一堆里头布满各种先进线路的金属盒子，一台显示雷达图象的显示器，外加一个通常不停旋转或以某中方式扫描的天线。