鸟类行为可分为繁殖行为、取食行为、社群行为和空间行为四大类。
The behaviors of birds are divided into four kinds, i. e. , the reproduction behaviors, feeding behaviors, gregarious behaviors and spatial behaviors.
第三部分陈述了解放区社区建设的实践过程；第四部分从社群主义视角出发，着重分析了这一个案；
The second part discusses the practical significance and theoretical value of our state's community building in the transition period.
正式上线四个月后，噗浪成为美国成长最快速的社群网站，甚至超越了Twitter与Facebook。
Four months after launch, Plurk became the fastest growing social networks in United States, with growth exceeding Twitter and Facebook.
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