Object Relational Model 对象关系模型
object-relational data model 对象关系数据模型
object relational data model 对象关系数据模型
object-relational database model 对象关系数据库模型
Relational and Object-oriented database model 关系和面向对象数据库模型
If the object model for your application doesn't translate easily into the relational model, you'll have quite a challenge mapping your objects to tuples and back again.
如果应用程序的对象模型不能够方便地转换到关系模型，那么在将对象映射到元组以及将元组映射回对象方面，会碰到一定难度。
JPA is a simplified programming model used for object relational mapping and data persistence.
JPA是一个用于对象关系映射以及数据支持的简化程序模型。
Good relational database practitioners and object model designers can have competing goals that make their respective implementations quite different from each other.
优秀的关系数据库人员和对象模型设计者可能具有相互竞争的目标，从而使得其各自的实现也具有很大的差异。
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