因为数据库表本身没有行为，开发人员常常把领域模型实体的行为放在服务或视图层中。
Because database tables by themselves do not have behavior, it's tempting to put the behavior of domain-model entities in services or the view layer.
因为数据库不支持与实体相关联的行为，领域模型最终只具有简单的变量以及相关的getter和setter方法。
Because databases do not support behavior associated with entities, the domain model ended up having simple variables with getter and setter methods for them.
用数据映射(Data Mapper)模式将领域实体映射到数据库schema。
A data Mapper pattern is used to map domain entities to the database schema.
这个应用使用领域模型表示这个系统中的实体，并使用ORM框架把领域模型映射到数据库上。
It has a domain model representing the major entities within the system, and USES an ORM framework to map the domain model to the database.
在数据库研究领域，模式匹配和实体统一是被广泛关注的两个方向。
Schema matching and entity resolution have been two topics widely studied in the field of database research.
在数据库研究领域，模式匹配和实体统一是被广泛关注的两个方向。
Schema matching and entity resolution have been two topics widely studied in the field of database research.
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