closed circuit television的意思

closed circuit television的音标：closed circuit television的英式发音音标为：[kləʊzd 'sə:kit 'teliˌviʒən]closed circuit television的美式发音音标为：[klozd 'sɚkɪt 'tɛləˌvɪʒən]...

The plant is operated entirely by remote control and monitored by closed circuit television or periscope.这个工厂完全用遥控操作,而且用封闭电路电视或展望镜来监视.Researchers observed the children via closed - circuit television and recorded their a...