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TOEFL IELTS BNC: 7112 COCA: 4780
radar
noun [C/U] /ˈreɪdɑː(r)/
singularradar
pluralradars
  1. 1
    a system that uses radio signals for finding the exact position of something such as an aircraft or a ship 雷达

    military radar systems 军事雷达系统

     Synonyms and related words
    Radio, radar and sonar signals: atmospherics, directional, footprint...
  2. From our crowdsourced Open Dictionary
    2
    fly beneath/under the radar to keep a low profile; to remain unnoticed

    Somehow his arrest on corruption charges flew beneath the radar of the local and national media.

    Submitted by Boris Marchenko from Russian Federation on 03/06/2017
TOEFL IELTS BNC: 7112 COCA: 4780
radar

noun

ADJECTIVE | VERB + RADAR | RADAR + NOUN | PREPOSITION | PHRASES ADJECTIVEenemy, police敵方雷達;警方雷達airborne, ground, ground-based機載/地面/陸基雷達long-range遠程雷達VERB + RADARbe equipped with配備雷達RADAR + NOUNoperator雷達操作員station, system雷達站;雷達系統antenna, detector, equipment, instrument, receiver, scanner, transmitter雷達天線/探測器/裝備/裝置/接收機/掃描儀/發射機screen雷達熒光屏beam, signal雷達波束/信號image雷達影像PREPOSITIONby radar通過雷達navigation by radar通過雷達導航on radar用雷達The submarine is impossible to detect on radar.雷達不可能探測到這種潛艇。PHRASESoff the radar, on the radar不在/在雷達的觀測範圍之內;不引人/引人注目The aircraft suddenly went off the radar.飛機突然從雷達顯示屏上消失了。He's barely on the radar of most movie-goers. (figurative) 大多數常看電影的人幾乎很少關注他。
TOEFL IELTS BNC: 7112 COCA: 4780

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