database access layer

• 数据访问层

database access layer的用法和样例：

例句

1. A data-access layer consists of methods that are used to access a data store.
   数据访问层由用于访问数据存储区的方法组成。
2. The data-access layer can be implemented as a separate Class Library project.
   数据访问层可实现为单独的类库项目。