【专四听力满分突破】社交网络的服务

　　选材规范、标准演练;循序渐进、梯度提升;题量丰富、有效提高;技巧同步、一语中的;缩略速记，全面覆盖。

　　注意直接听写正文

　　A social networking service is an online service that focuses on building and reflecting of social networks or social relations among people. A social networking service essentially consists of three things. First, a representation of each user. Second, his or her social links. And third, a variety of additional services. Most social networking services are Web-based. They provide means for users to interact over the Internet, such as email and instant messaging. Online community services are sometimes considered as a social networking service in a broader sense. However, a social networking service usually means an individual-centered service whereas online community services are group-centered. Social networking sites allow users to share ideas, activities, events, and interests within their individual networks. The main types of social networking services are ones containing category places, means to connect with friends and a recommendation system linked to trust. Many networks focus on providing both services and community to individuals with shared interests.