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TOEFL IELTS BNC: 7112 COCA: 4780
radar
/ˈreɪdɑ:(r) ||; ˈredɑr/noun [U] a system that uses radio waves for finding the position of moving objects, for example ships and planes 雷达: This plane is hard to detect by radar. 这种飞机雷达很难发现。 ☞Compare sonar. 与sonar比较。
TOEFL IELTS BNC: 7112 COCA: 4780
radar/ˋredɑr; ˈreIdɑː/ n [C,U] a method of finding the position of things such as planes and ships using radio waves, or the equipment that does this 雷达﹔雷达装置
TOEFL IELTS BNC: 7112 COCA: 4780
radar radarradars noun (no plural)a way of finding where a ship or an aircraft is and how fast it is travelling by using radio waves

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