A hotbed of activity has emerged around how XML content formats and XML-based metadata systems can support learning and instructional technology.
围绕着如何将xml内容格式和基于XML的元数据系统用于支持学习和教育技术，已经出现了一个实践的温床。
A hotbed of activity has emerged around how XML content formats and XML-based metadata systems can support learning and instructional technology.
围绕着如何将xml内容格式和基于XML的元数据系统用于支持学习和教育技术，已经出现了一个实践的温床。
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