元数据允许rss阅读器了解诸如内容类型(文本还是多媒体)、出版日期之类的信息。
This metadata allows an RSS reader to understand such things as the type of content (text versus multimedia), the date of publication, and so forth.
有了替代文本后，屏幕阅读器之类的辅助技术就可以以另一种方式传达图片的内容。
With alternative text the assistant technology, such as a screen reader, can convey the meaning of the image in an alternative way.
Google等搜索引擎可以识别、分类和索引您的文本内容，并且屏幕阅读器可以处理精确的文本内容。
Search engines like Google recognize, categorize, and index your textual content, and screen readers can deal with the accurate textual content.
Google等搜索引擎可以识别、分类和索引您的文本内容，并且屏幕阅读器可以处理精确的文本内容。
Search engines like Google recognize, categorize, and index your textual content, and screen readers can deal with the accurate textual content.
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