- A word processing formatting control that moves the printing or display point to the left one escapement unit as defined to provide character alignment in proportionally spaced text.; 一種文字處理格式控制符，在按比例隔開的正文中，把打印點(diǎn)或顯示點(diǎn)左移一個(gè)規(guī)定的移位單位來對(duì)齊字符.參閱backspace character
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