blog和wiki都是Web 2.0技术，它们允许用户针对一个特定主题或想法进行协作。
Both blogs and wikis are Web 2.0 technologies that allow users to collaborate on a particular subject or thought.
根据定义，数据市场是数据仓库的一个子集，是专门针对特定的用户群或特定的主题领域设计的。
By definition, a data mart is a subset of a data warehouse designed for a specific group of users or a particular subject area.
以前，用户只能看到一个某一个用户或者整个社区(称之为Statussphere)更新的视频，但是没法观看针对某一个特定主题相关的视频。
Previously, users could only tune into the short video updates posted by a single user or by the entire community, dubbed the Statusphere, and not hone in on one particular topic.
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