closed circuit television 的英语意思
closed circuit televisionˌclosed circuit ˈtelevision noun [uncountable] 
查看全部语言翻译 (abbreviation CCTV) a system of cameras placed in public buildings or in the street, used to help prevent crime一种在公共建筑或街道上安装摄像头的系统，用于协助预防犯罪
查看全部语言翻译 (abbreviation CCTV) a system of cameras placed in public buildings or in the street, used to help prevent crime一种在公共建筑或街道上安装摄像头的系统，用于协助预防犯罪