With it,two people can see each other when talking.

问题描述:

With it,two people can see each other when talking.
为什么这里用with而不用by

Two people can see each other when talking by it.这个时候才用by
在这里with还有“用着它”这个状态的意思,你可以一边聊天一边视频.而by只有“以某种方式”的意思.