不可见字符。如控制符、回退删除符、换行符等。
A character with no visible representation, such as a control character, a backspace, newline, and so on.
介绍了在VB环境中实现串行通信的技术，提出了一种解决不可见字符传输的方法。
Technique of serial communication realized by VB is introduced and a method for transmitting invisible characters is proposed.
屏幕上所显示的是CCNA01# ；对于许多设备来说，这是非常典型的，这个提示符实际上嵌入了一些不可见的控制字符。
What shows on the screen is just CCNA01# ; as is typical for many devices, though, this prompt actually embeds invisible control characters.
要记住AST类在包外是不可见的， 还有就是客户机（最终）只会传入它们想求值的表达式的一个字符串表示。
Remember that the AST classes aren't visible outside of this package at all and that clients will (eventually) simply pass in a String representation of the expression they want evaluated.
可以注意到表单自身是不可见的，而且你可以注意到在大多数浏览器中，文本输入框的宽度被默认为20个字符大小。
Note that the form itself is not visible. Also note that in most browsers, the width of the text field is 20 characters by default.
一个相对于页面顶部的点，文档中要用来对自选图形或东亚字符进行绘制、移动和大小调整的不可见网格将从该点开始。
Gets or sets the point, relative to the top of the page, where you want the invisible grid for drawing, moving, and resizing AutoShapes or East Asian characters to begin in the document.
获取或设置一个相对于页面左边缘的点，文档中用来对自选图形或东亚字符进行绘制、移动和大小调整的不可见网格将从该点开始。
The point, relative to the left edge of the page, where you want the invisible grid for drawing, moving, and resizing AutoShapes or East Asian characters to begin in the document.
获取或设置一个相对于页面左边缘的点，文档中用来对自选图形或东亚字符进行绘制、移动和大小调整的不可见网格将从该点开始。
The point, relative to the left edge of the page, where you want the invisible grid for drawing, moving, and resizing AutoShapes or East Asian characters to begin in the document.
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