_的意思是下划线经(jīng )常接(jiē )触到的一般用在(zài )名字的输(shū )入(rù )中,只(zhī )可(kě )以输入数字,字母(mǔ ),下划线而(ér )在(zài )一些(xiē )文(wén )档(dàng )如(rú )WORD中(zhōng ),下划(huá )线常被用作(zuò )增(zēng )强注意(yì )而在(zài )网页(yè )中,可以(yǐ )链接(jiē )的文字超链接(jiē )下面一(yī )般都有下划(huá )线符号quot_quot下划线一般分
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