cntrl：控制(非打印)字符。
其中一些选项控制它输出非打印字符的方式，例如制表符和控制字符。
Some of them control the way it outputs nonprinting characters, such as tabs and control characters.
使用非打印字符分割 ViewState中存储的对象有两个目的。
Using nonprintable characters to delineate the objects stored in view state serves two purposes.
cat还可以在您查看包含如制表符这样的非打印字符的文件时起帮助作用。
Cat can also help when you are viewing files that contain non-printing character like tabs. You can reveal them with these options.
无纸记录器将图表显示在记录器的图形显示屏中，而非打印在纸张上。
Paperless recorders display the chart on the recorders' graphic display rather than print the chart on paper.
在一般情况下，字符串转义的功能以及进一步摆脱这些字符，非打印字符，如适用。
In general, string escaping functions escape these characters as well as further, non-printable characters, if applicable.
非打印字符：某个特殊字符，如制表符或者段落截止符，通常隐藏不能被打印但可显示出来。
A special character, for example tabstop or paragraph break that is normally hidden and cannot be printed, but which can optionally be displayed.
表面的轧制离开平坦的表面，但不是在非打印区域的墨水用油墨覆盖的滚子(稿样)，表面上满是油墨。
The surface is covered with ink by rolling over the surface with an ink-covered roller (brayer), leaving ink upon the flat surface but not in the non-printing areas.
你可以创建可见的网格来辅助页面排版：你的页面排版软件有辅助线的功能，或者你可以在非打印层绘制边线或方块。
You can create a visible grid to aid in page layout using the guidelines feature of your page layout software or by drawing lines or boxes that you place on a non-printing layer of your publication.
你可以创建可见的网格来辅助页面排版：你的页面排版软件有辅助线的功能，或者你可以在非打印层绘制边线或方块。
You can create a visible grid to aid in page layout using the guidelines feature of your page layout software or by drawing lines or boxes that you place on a non-printing layer of your publication.
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