Business users may be aware that a database is involved, but have little idea of the complex architecture needed to keep their data organized, related, linked, current, consistent, and available.
业务用户可能知道涉及到数据库，但是不太清楚保持数据有条理、相关、链接、当前、一致和可用所需的复杂架构。
Additional database update strategies need to be considered when using more than one cell for this type of update, because the cell running in production will not be aware of the new database schema.
当对这种类型的升级使用多个单元时，需要考虑其他数据库更新策略，因为在生产中运行的单元将不会识别新的数据库架构。
The layer is well aware of the database, so neither mock objects nor POJT techniques should be applied.
该层对数据库非常敏感，所以该层不能应用模仿对象或POJT技术。
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