这里(lǐ )需要说明的(de )是(shì ),在我(wǒ )们系统(tǒng )里面如(rú )果(guǒ )单独设置一(yī )个子(zǐ )域名解析(xī ),比如将(jiāng )主(zhǔ )机(jī )名设(shè )置为mail,单独解析到(dào )9,那么(me )该解析(xī )记录优先泛域(yù )名在实(shí )际使(shǐ )用中作用是非常广泛的,比如(rú )实现无限(xiàn )二级域名(míng )功能,提(tí )供(gòng )免费的(de )url转(zhuǎn )发,在
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