然而，你应该在你的网站设计创建您自己的标题和描述元标签。
However, you should create your own title and description meta-tags in your site design.
通用标签也能提供有用的元数据(metadata)来描述各个对象间的相对关系。
Common Tag also provides access to useful metadata that defines each concept and describes how the concepts relate to one another.
元数据描述标签。
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