Printers recognize the form-feed character and automatically advance the print head by the required number of lines necessary to begin the next line of data on a new page.
打印机会识别换页符并自动根据在新的页开始新行所需的行数移动打印头。
Matches any white space character including space, tab, form - feed, and so on.
匹配任何空白字元，包括空格、制表符、换页符等。
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