Although Facebook, the world's most popular social network, has more members than Twitter, that's not what this measurement is about - it's about growth.
Facebook世界上最受欢迎的网站，拥有最多的成员。不过，这个报告是关于增长最快的调查。
2
Radian6; Social Media Monitoring, Measurement and Engagement.
Radian 6；社交媒体监督、测量和参与。
3
Employment relations, social class and health: a review and analysis of conceptual and measurement alternatives.