以此为基础，可以进一步扩展服务，提供更方便的操作，支持更复杂的注解，但是本文只关注最简单的功能。
If you build on this idea you may want to tailor the service a bit to provide convenience operations facilitating more complex annotations, but for this article we keep it simple.
通过在一个完整的屏幕上完成诸如项目、人物和短语等参考资料的拉出、集合以及显示，这项功能将使电子书阅读器的注解应用提升到更高层次。
This takes e-reader footnotes to another level by pulling, aggregating and displaying references in a book -- notable items, characters/people and phrases -- in one screen.
本文将主要关注于简化的配置和在Spring应用程序上下文（application context）核心新增的基于注解的功能；
The current article will focus on simplified configuration and new annotation-based functionality in the core of the Spring application context.
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