Here is what Professor Wellman means.Before the invention of the Internet and e-mail, our social networks included live interactions with relatives, neighbors, and friends.

• 威尔曼教授认为，在互联网和电子邮件问世之前，我们的社会网络只包括我们与亲戚、邻居和朋友之间进行的那些现场的交流。