这些设计指南包括了选项和文本菜单的区别，如何排列菜单项目，什么时候在屏幕上放置命令，还有其他一些菜单设计细节。
These guidelines describe the difference between Options and Context menus, how to arrange menu items, when to put commands on-screen, and other details about menu design.
输入文件按照它们在cat命令后的排列顺序被打印，因此，要调换信息的顺序，就必须先调换输入文件的顺序。
The input files are printed in the order they are listed after the cat command, so to reverse the order of information, you must first reverse the order of input files.
附录B .按功能排列的命令行和GUI支持。
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