A fundamental technical challenge in the analysis of network data is the automated discovery of communities - groups of nodes that are strongly connected or that share similar features or roles. In this commentary we review progress in the field over the last 20 years.

翻译：在分析网络数据方面,一个根本性的技术挑战是自动发现社区 -- -- 紧密相连或具有类似特点或作用的节点群体 -- -- 。