必须通过此模块的课程和考试。
Both the coursework and the exam must be passed for this module.
通过此模块生成索引供搜索模块使用，从而实现全站搜索的功能。
The index generated by this module can then be used by the search module to provide an integrated full-text search experience for a web site.
如果现有数据元素发生了变化或添加了新数据元素，可通过查询此数据库来确定必须更改哪些源模块和数据文件。
A query to this database could determine what source modules and data files must change if an existing data element is altered or a new data element is added.
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