( security cameras)
A security camera is a video camera that records people’s activities in order to detect and prevent crime.
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( security cameras)
A security camera is a video camera that records people’s activities in order to detect and prevent crime.
N-COUNT
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006