Mixed networks: There are a number of social networks that have a subscription of people from all the above groups and is a heterogeneous social network serving multiple types of social collaboration.

综合网络：这类网络包含了来自以上所有类别的人员，并且是一种异构社交网络，服务于多种类型的社会协作。

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For these young people, an online social network mirrors the social groups established by older generations through offline activities.

对于这些年轻人而言，一个在线的社区网络相当于年长世代的人通过线下活动建立的社交团体。

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The further away two people or groups are in a social network, the higher the threshold the relay behavior is.

在一个社交网络中，离群体越远，个人行为的差异就越大。

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In addition to their letter to the social network, the groups also called on advertisers to boycott the site, noting that their advertising appeared alongside user-created pages showing images of violence towards women that were "shared, boasted and joked about".

BBC: Facebook bows to campaign groups over 'hate speech'

"On websites, blogs and social network forums, many groups have provided template letters and resources for parents to use in drafting such requests, " read a memo from New York State Association of School Attorneys released this week to guide districts through the issue.

WSJ: Some NY parents to boycott new, harder state tests

Facebook last month launched a new Groups feature, allowing users to create groups on the social network and add friends by tagging them in the group.

FORBES: Zuckerberg: Facebook Groups Is One Of Our Fastest Growing Products