The fifth-generation iPod nano can buy songs that are identified by RDS text and tagged.
第五代iPod Nano也能够通过阅读RDS文字和标签来购买。
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Yet another example might take as input a Web site (such as a news site like CNN) and render the text in photos by matching tagged photos to words from the news.
Hypertext is a text that is organized by means of links. Or jumps, from one piece of information to another, the reader can move to related topics by tagged words or phrases.