The power of this layer is in separating data access code from the business logic for disparate data store technologies.
该层的作用在于针对不同的数据存储技术，从业务逻辑中分离数据访问代码。
Setting up connectivity to a data store, finding all classes annotated as entities, and configuring the persistence logic to bind these classes to entities in the data store is not a quick operation.
建立到数据存储的连接、查找标注为实体的所有类、配置持久化逻辑以将这些类绑定到数据存储中的实体，整个过程不可能快速完成。
The Model contains all the business logic necessary to retrieve data from a persistent data store.
模型包含所有必须的业务逻辑，从存储数据仓库中检索数据。
Checking in a SOAP attachment into the Claim Check data store before performing business logic.
在执行业务逻辑之前将一个SOAP附件签入ClaimCheck数据存储中。
The business logic in WebSphere Commerce USES this store path to retrieve catalog data, making it seem that it is inside the customer store, even though it is inherited from the asset store.
WebSphereCommerce中的业务逻辑使用该存储路径来检索目录数据，使它看起来好像在客户存储中，虽然它是从资产存储中继承来的。
Any data source (file, web service, custom store, application logic layer, etc).
任意的数据源(文件、Web服务、定制存储、应用逻辑层等)。
Third, through the study on project database, use the data stock of logic level to store the figure restraint and management of the water conservancy drawing-library.
第三，通过对工程数据库的研究，运用逻辑层次数据库存储图形约束及水工图库的管理。
They must model the entities, relationships, and logic of the business problems they are solving, and they must also work with the data engines used to store and retrieve the data.
他们必须为他们要解决的业务问题的实体、关系以及逻辑进行建模。同时他们还必须使用数据引擎来存储和关系相关数据。
As the memo field is used to store the test questions and their answers, the general logic structure of the test—question library has been simplified and the data—processing has been speeded up;
由于使用备注字段存贮试题和答案，简化了题库的整体逻辑结构，并能提高数据处理的速度；
As the memo field is used to store the test questions and their answers, the general logic structure of the test—question library has been simplified and the data—processing has been speeded up;
由于使用备注字段存贮试题和答案，简化了题库的整体逻辑结构，并能提高数据处理的速度；
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