| 释义 | counter-surveillance noun[ U ]
 (alsocountersurveillance)uk /ˌkaʊn.tə.səˈveɪ.ləns/ us /ˈkaʊn.t̬ɚ.sɚˌveɪ.ləns/
 the activity of using various methods and machines to find out if you are under surveillance(= being watched by the authorities or an enemy) :
 As part of my job I was instructed in counter-surveillance.
 Anyone can now buy countersurveillance equipment that can detect a variety of spying devices.
 The point of counter-surveillance is to find out whether you are being followed or not.
 A counter-surveillance team had swept his home and office for bugs.
 Organized crime groups are using technology to evade police and conduct counter-surveillance.
 SMART Vocabulary: related words and phrases
 Using the eyes
 accommodate
 accommodation
 all eyes are on someone/somethingidiom
 astigmatic
 beholder
 cast
 corner
 discern
 fix
 glare
 penetrating
 perceive
 re-sight
 rest on someone/something
 resurvey
 rubbernecking
 scope
 sighting
 spot
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