The other problem with ActiveRecord that transparent persistence solves is subclassing.
透明持久化解决了的ActiveRecord的另外一个问题就是子类化。
Transparent persistence frameworks let you add persistence to applications through configuration rather than code.
透明持久性框架通过配置而不是编写代码，来使您为应用程序添加持久性。
You can think of JPA as the successor to well-known transparent persistence technologies such as JDO and Hibernate.
您可以把JPA看作是众所周知的透明持久性技术(如jdo和Hibernate)的继承者。
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