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TOEFL IELTS BNC: 7112 COCA: 4780

radar

Word family
ra·dar /ˈreɪdɑː $ -ɑːr/ ●○○ noun  
1 TMTT[countableC, uncountableU] a piece of equipment that uses radio waves to find the position of things and watch their movement 雷达 sonar
 The coastline can now be monitored by radar.
现在能用雷达监测海岸线了。
 We could see the plane quite clearly on the radar screen.
我们在雷达屏幕上可清晰地看到飞机。
2 on somebody's/the radar (screen) if something is on your radar, you have noticed it and are giving it some attention 受某人关注的/受关注的
 This is one of the issues on our radar.
这是我们所关注的事件之一。
3 fly/slip under somebody's/the radar to not be noticed by someone 没被某人注意/没被注意
 How did this band slip under the radar?
这支乐队怎么会没受到关注?
Examples from the Corpus
From Longman Business Dictionary
radarra·dar /ˈreɪdɑ-dɑːr/ noun [uncountableU]
1be off/below the radar (screen) used when saying that people do not know about or are not thinking about something, especially something that will later become important
Many of these technologies were below the radar of the mainstream business press.
HIV/AIDS has fallen off our radar screens in recent years.
2be on the radar (screen) used when saying that people know about or are thinking about something, especially something that will later become important
Stem cell research and biotech in general are on the radar screen of venture capitalists nationwide.
Origin radar
(1900-2000) radio detection and ranging
ra·dar noun
Chinese
Syllable
Corpus
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
TOEFL IELTS BNC: 7112 COCA: 4780
radar
Radio, radar and sonar signals: atmospherics, directional, footprint...

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