radar
['reidɑ:]
n. 雷达
例句与用法：
They picked up the yacht on their radar screen.
他们在雷达屏上看到了那艘游艇。
They were able to position the yacht by means of radar.
他们能够用雷达测定快艇的方位。
The radar scanned the sky for enemy planes.
雷达密切监视天空，搜索敌机。
The watchtower followed the aircraft by radar.
瞭望塔通过雷达追踪这架飞机的行踪。
详细释义：
n.
雷达[C]
There are enemy aircraft on the radar screen.
雷达荧屏上出现了敌人的飞机。