A code extension character that can is used by itself to cause a return to the character set in effect prior to the departure caused by a shift out character , usually to return to the standard character set 一種代碼擴(kuò)充字符,其作用是返回原字符集,即返回到在移出字符之前起作用的那個(gè)字符集,通常是返回到標(biāo)準(zhǔn)字符集。