音标：['reidә] ；柯林斯词典等级：2 级；

n. 雷达, 无线电探测器
[计] 雷达图

n. measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects

词型变化：名词复数形式 : radars
考试类型：[四级/六级/考研/托福/IELTS]

词性分布：

名词100%

radar的用法和样例：

例句

用作名词(n.)

There are enemy aircraft on the radar screen.雷达萤屏上出现了敌人的飞机。
They plotted aircraft movements by radar.他们借雷达标示飞机的动向。

常见句型

用作名词(n.)

The ship, with the help of radar, sailed in thick fog.这艘船借助于雷达在浓雾中航行。
They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。

词汇搭配

用作名词 (n.)

形容词+～

early-warning radar预警雷达
marine radar船用雷达

～+名词

radar beacon〔bombing, control, installation〕雷达信标〔轰炸,控制,装置〕
radar fence〔scope, screen〕雷达警戒网〔显示器,荧光屏〕

介词+～

by〔on〕 radar用雷达

【近义词】

detector探测器
locater定位器
sensor传感器
position finder测位仪,测位器...
radiolocation用电波探测器探测...
radio detection and ranging无线电定位
microwave radar微波雷达

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