radar
翻译
雷达
例句
The ship was detected by radar.
这艘船被雷达探测到了。
He's trying to fly under the radar.
他正试图悄悄行事,不引人注意。
语法模式
((by radar)) 通过雷达 The plane was tracked by radar.
((under the radar)) 不引人注意地 He managed to stay under the radar for months.
近义词
同义词: detector (探测器), scanner (扫描仪)
词源
它是“RAdio Detection And Ranging”(无线电探测和测距)的首字母缩写词。
记忆技巧
想象一下蝙蝠使用声波(声纳);雷达则使用无线电波来探测物体。