What is the data access layer implemented with?
数据访问层使用什么实现？
In the process, it also interacts with the data access layer.
在运行过程中，它还会与数据访问层进行交互。
The business layer generally interacts with the information system through the data access layer.
业务层主要通过数据访问层与信息系统实现交互。
The business layer generally interacts with the information system through the data access layer.
业务层主要通过数据访问层与信息系统实现交互。
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