这里(lǐ )需(xū )要说(shuō )明的(de )是(shì ),在我们(men )系(xì )统里面如果(guǒ )单独设置(zhì )一个子域名解(jiě )析,比(bǐ )如(rú )将主机名设置(zhì )为(wéi )mail,单(dān )独解析(xī )到9,那么该解析记录优(yōu )先泛域(yù )名在实际使用中作用(yòng )是非(fēi )常广(guǎng )泛(fàn )的,比如实现无限(xiàn )二级(jí )域(yù )名功(gōng )能,提供(gòng )免费的url转发,在
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