nonprinting character

• 非打印字符

nonprinting character的用法和样例：

例句

1. A similar relation holds for the other nonprinting characters.
   其他非打印字符也用相似的方法处理。
2. Can also help when you are viewing files that contain non-printing character like tabs.
   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。