这里需要说明的(de )是,在我(wǒ )们系(xì )统里(lǐ )面如果(guǒ )单独设置一个子域(yù )名(míng )解(jiě )析(xī ),比(bǐ )如(rú )将主(zhǔ )机(jī )名设(shè )置为mail,单(dān )独(dú )解析到9,那(nà )么(me )该解析(xī )记录优先泛域名(míng )在(zài )实际使(shǐ )用中作用(yòng )是非常广泛的,比如实现无限(xiàn )二级(jí )域(yù )名功(gōng )能,提供免费的url转发,在
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