radar

名词 radar:

1. measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects
   同义词：microwave radar, radio detection and ranging, radiolocation

1. They picked up the yacht on their radar screen.
   他们在雷达屏上看到了那艘游艇。
2. 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。
3. The radar scanned the sky for enemy planes.
   雷达密切监视天空，搜索敌机。
4. The watchtower followed the aircraft by radar.
   了望塔通过雷达追踪这架飞机的飞行。

ra.dar

n.（名词）
A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of very high frequency radio waves reflected from their surfaces.
雷达：通过对从物体表面反射的较高频无线电波的分析发现远处的物体并测定其位置、速度或其它特征的
The equipment used in such detection.
雷达装置：在这种探测中使用的设备
n.attributive.（定语名词）
Often used to modify another noun:
经常用于修饰另一个名词：
例句：
radar technology; a radar installation.
雷达技术；一个雷达站

来源：
ra(dio)
ra(dio)
d(etecting)
d(etecting)
a(nd)
a(nd)
r(anging)
r(anging)