这里(lǐ )需(xū )要(yào )说(shuō )明的(de )是,在我(wǒ )们系统(tǒng )里面如果(guǒ )单(dān )独(dú )设置一个子域(yù )名(míng )解析,比如将主(zhǔ )机名(míng )设置(zhì )为mail,单独解析到(dào )9,那么(me )该解(jiě )析记(jì )录优先(xiān )泛域名在实际使(shǐ )用中作(zuò )用是(shì )非常广泛的,比(bǐ )如(rú )实现无(wú )限二级域名功能,提供免(miǎn )费的url转发,在
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