那么对于像youtube和flickr这样的社会性网络服务又是什么情况呢？
可采取分步推进的策略，通过三个阶段实现图书馆的SNS服务，即：加入已有社会网络站点、添加社会性软件和提供社会网络服务。
The step-by-step strategy can be taken, which includes three phases: joining in existing social networking sites, adding social software tools and providing social networking service.
可采取分步推进的策略，通过三个阶段实现图书馆的SNS服务，即：加入已有社会网络站点、添加社会性软件和提供社会网络服务。
The step-by-step strategy can be taken, which includes three phases: joining in existing social networking sites, adding social software tools and providing social networking service.
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