我可以通过我的网络摄像头看到世界另一端的家人。

I can see my family on the other side of the world through my ___webcam.

为了我们的线上会议，每个人都打开了他们的网络摄像头。

For our online meeting, everyone turned on their ___webcam.

这个安全系统包含一个监控前门的网络摄像头。

The security system includes a ___webcam that monitors the front door.