All but one of the XML documents are in substance the same as eg_3_1.xml, but with different instructions for loading each CSS file.
除了其中一个之外，所有xml文档都基本上与eg_3_1 . xml相同，只是加载CSS文件的指令不同。
Loading times, skip buttons, missing instructions on navigation and many other issues are all subject of considerations here.
加载时间、跳过按钮、无固定导航栏与其他部分都是我们需要思考的点。
What that means is that the computer can do many different things by loading and following different sets of instructions, called programs.
也就是说，计算机可以根据不同的设置或者命令做出许多不同的事情来，这就是程序。
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