radar
翻譯
雷達
例句
The ship was detected by radar.
這艘船被雷達探測到了。
He's trying to fly under the radar.
他正試圖悄悄行事，不引人注意。
文法模式
((by radar)) 透過雷達 The plane was tracked by radar.
((under the radar)) 不引人注意地 He managed to stay under the radar for months.
近義詞
同義詞: detector (探測器), scanner (掃描儀)
詞源
它是「RAdio Detection And Ranging」（無線電探測和測距）的首字母縮寫詞。
記憶技巧
想像一下蝙蝠使用聲波（聲納）；雷達則使用無線電波來探測物體。