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1·Page description language is a new kind programming language with powerful graphics description ability.

页面描述语言是一种新型的程序设计语言，具有很强的图形描述功能。

2·Postscript: A page description language developed by, Adobe Systems Inc. of America. It is a computer programming language which tells a corresponding output device how to print the page.

后记码：由美国阿都比系统公司开发的页述语言。它是一种电脑程式语言，指示一部有关的输出装置如何把一页印出。

3·Now that the Web-page thumbnails are in place, the generation of the graph description language can begin.

既然已经生成了Web页面缩略图，现在可以开始生成图形描述语言了。