名詞 radar:

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

1. They picked up the yacht on their radar screen.
   他們在雷達(dá)屏上看到了那艘游艇。
2. They were able to position the yacht by means of radar.
   他們能夠用雷達(dá)測定快艇的方位。
3. The radar scanned the sky for enemy planes.
   雷達(dá)密切監(jiān)視天空，搜索敵機(jī)。
4. The watchtower followed the aircraft by radar.
   了望塔通過雷達(dá)追蹤這架飛機(jī)的飛行。

ra.dar

n.（名詞）
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.
雷達(dá)：通過對從物體表面反射的較高頻無線電波的分析發(fā)現(xiàn)遠(yuǎn)處的物體并測定其位置、速度或其它特征的
The equipment used in such detection.
雷達(dá)裝置：在這種探測中使用的設(shè)備
n.attributive.（定語名詞）
Often used to modify another noun:
經(jīng)常用于修飾另一個(gè)名詞：
例句：
radar technology; a radar installation.
雷達(dá)技術(shù)；一個(gè)雷達(dá)站

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