ActiveRecord is not a full object relational mapping layer.
ActiveRecord并非全对象关系型映射层。
In addition, because there is no reference mapping layer, you must specify the raw JNDI name of the remote EJB.
此外，因为没有引用映射层，所以必须指定远程EJB的原JNDI名称。
In Figure 2, you can see that the client application container provides a reference resolution and mapping layer with JNDI.
在图2中可以看到，客户机应用程序容器提供了带有JNDI的引用解析和映射层。
In such a design, updates are applied to objects and it is the responsibility of the mapping layer to migrate those changes to a relational database.
在这样的设计中，更新被应用到了对象上，映射层的职责就是将这种变化反映到关系数据库中。
In such a design, updates are applied to objects and it is the responsibility of the mapping layer to migrate those changes to a relational database.
在这样的设计中，更新被应用到了对象上，映射层的职责就是将这种变化反映到关系数据库中。
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