Browse by category or by topic: view information under each category or topic TAB i.e. publications, language, country, etc., narrowing or refining the search to find the most relevant results.
通过分类或者标题来浏览：在每个分类或者专题标签(如出版物、语言、国家等)下浏览信息，缩小或改进搜索范围，以找到最相近的结果。
An example of multiple types is a view constrained by category and subcategory.
多类型示例指受类别和子类别约束的视图。
Ajax makes this implementation even better: By loading only one category when a user expands a view, you can save a lot of overhead and provide a benefit to your users.
Ajax能进一步优化此实现：在用户展开视图时仅载入一个类别，从而可使您节省大量开销，并使您的用户受益。
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