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历史:
CET-4 CET-6 考研 TOEFL IELTS BNC: 7112 COCA: 4780
radarradarD.J.:[ˈreidə]K.K.:[ˈredɑr]n.1.雷达The ship, with the help of radar, sailed in thick fog.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。2.雷达装置Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。

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