服务对象数据(Service Data Object, SDO)使用统一的抽象代替了各种各样的数据访问模型来创建、检索、更新和删除供服务实现使用的业务数据。

Service data Objects (SDOs) replace diverse data access models with a uniform abstraction for creating, retrieving, updating, and deleting business data used by service implementations.

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GORM 有助于缓解抽象泄漏问题，它支持使用对 Groovy 有意义的方式表示对象模型，由 GORM 在幕后处理关系数据库的问题。

GORM helps mitigate the leaky-abstraction problem by allowing you to represent your object model in a way that makes sense in Groovy.

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完善了对象模型(密闭、抽象类属性和许多其他细节都已经解决)。

Completing the object model (sealed, abstract class attributes and many other details have been addressed).

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