By definition, a data mart is a subset of a data warehouse designed for a specific group of users or a particular subject area.
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。
As you can clearly see, these three categories represent only a subset of the overall needs of virtual image users. In particular, they do not address.
显而易见，这三类内容只是虚拟映像用户所需的东西的一部分。
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