管理这样一个关系在概念上同现代关系数据库技术中的关系建模相似。
The ability to manage such a relationship is similar in concept to relationship modeling in modern relational database technology.
当然，我们可以添加社区、消息和很多其他内容，不过，我们将从其核心内容开始，而且我们将使用数据库表对这些概念进行建模。
Sure, there are communities and messages and lots of other things we could add in, but we'll start with the core of it, and we'll model these concepts with database tables.
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