An atoll is a ring - shaped island that encloses a central lagoon.环礁是一座环状的岛屿,中心围起一团海水形成泻湖.The wall encloses the hospital.围墙将那所医院围在里面.A wall encloses the park.墙围着公园.An unspoilt coral reef encloses the bay.未受破坏的珊瑚礁环绕在海湾周围。...
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...