Consult the PEAR repository, which currently contains a small number of low-level PHP math classes.

请查阅PEAR资源库，它目前包含了少量低级别的php数学类。

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The additional information in the JAR manifest is used to define the specific class (or classes) to be exposed by the repository and consumed by an application.

JAR清单文件中的额外信息用于定义存储库将公开且应用程序将使用的特定类。

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Although the standard use relies on using base classes, this is not required, you can use ActiveRecord with different patterns like Repository.

虽然基于基类的使用是标准的方式，但这不是必要的，你可以以不同的模式来使用ActiveRecord，如Repository。

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