Object-Relation Mapping(ORM) handles persisting objects to and from the record of underlying relation database, it is an object-oriented method to develop application.

对象-关系映射就是把对象映射到关系数据库中的记录，它是完全从面向对象的角度来设计和开发程序的。

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Object-relation mapping(ORM) handles persisting objects to and from the records of underlying relation database, it is an object-oriented method to develop application.

对象-关系映射就是把对象映射到关系数据库中的记录，它是完全从面向对象的角度来设计和开发程序的。

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An example in this category is the migration from a structured design method for a tool facing end-of-life to an object-oriented design method using the Unified Modeling Language (UML).

这类情况的一个典型的例子就是，使用Unified Modeling Language (uml)将一个走到尽头的结构化的设计方法移植到一个面向对象的设计方法。

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