the globe's largest online social network boasts over 350m users-_英语解答

the globe's largest online social network boasts over 350m users-----which,were it a nation,would make .
主要不懂的就是which后面的were it a nation 怎么理解,怎么从语法上去分析

人气：233 ℃　时间：2019-12-15 10:35:20

解答

就是if it were a nation ,虚拟语气“如果是这么多人组成的一个国家的话……”