摘要：
7 Media types媒体类型 7.1 Introduction to media types 介绍媒体类型 One of the most important features of style sheets is that they specify how a document is to be presented on different media: on the screen, on paper, with a speech synthesizer, with a braille device, etc. 样式表的一个重要特性是其指定了在不同的媒体上一个文档如何呈现：例如在屏幕上 阅读全文
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