Rails plugins represent the framework's own extension mechanism.

Rails 插件为该框架自身提供了扩展机制。

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The next four chapters get into some of the advanced technologies that Rails work with, such as Ajax, security issues, advanced topics, and plugins.

后面四章详细说明了Rails所涉及到的一些先进技术，例如Ajax、安全问题、高级主题，以及插件。

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Rails 3 Ready Plugins - If you're heavily dependant on a certain plugin, see if it's already on the confirmed Yes/No list of plugins that do/don't work with Rails 3.0.

—— 如果您在很大程度上依赖某一个插件，看它是否已经在确认兼容或不兼容Rails 3.0的插件列表中。

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