camera monitor

例句：

1. 1.The camera monitor is essential for monitoring the security of the building.
   相机监视器对于监控建筑物的安全至关重要。
2. 2. The camera monitor helps to keep an eye on the children's activities in the classroom.
   相机监视器有助于监督孩子们在教室的活动。
3. 3. The camera monitor was installed to improve the quality of the surveillance footage.
   安装相机监视器是为了提高监控录像的质量。