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　　免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的??(de)發(fā)??(fa)育??(yu)如??(ru)同??(tong)建??(jian)造??(zao)一??(yi)座??(zuo)城??(cheng)堡??(bao)??，需?(xu)要??(yao)從?(cong)地??(di)基??(ji)開??(kai)始??(shi)逐??(zhu)步??(bu)完??(wan)善??(shan)??。??　　先??(xian)天??(tian)性?(xing)免??(mian)疫??(yi)是??(shi)人??(ren)類??(lei)與??(yu)生??(sheng)俱??(ju)來??(lai)的??(de)防??(fang)御??(yu)系??(xi)統(tǒng)??(tong)??，如??(ru)同??(tong)城??(cheng)堡??(bao)的??(de)第??(di)一??(yi)道??(dao)城??(cheng)墻??(qiang)和??(he)巡??(xun)邏??(luo)衛(wèi)??(wei)兵??(bing)??，能??(neng)在??(zai)病?(bing)原??(yuan)體??(ti)入??(ru)侵??(qin)時??(shi)迅??(xun)速??(su)反??(fan)應??(ying)??。??UGWGOAPPQVqibao666888　　mian ??(mian)yi ??(yi)xi ??(xi)tong ??(tong)de ??(de)fa ??(fa)yu ??(yu)ru ??(ru)tong ??(tong)jian ??(jian)zao ??(zao)yi ??(yi)zuo ??(zuo)cheng ??(cheng)bao ??(bao)??，xu ?(xu)yao ??(yao)cong ?(cong)di ??(di)ji ??(ji)kai ??(kai)shi ??(shi)zhu ??(zhu)bu ??(bu)wan ??(wan)shan ??(shan)??。??　　xian ??(xian)tian ??(tian)xing ?(xing)mian ??(mian)yi ??(yi)shi ??(shi)ren ??(ren)lei ??(lei)yu ??(yu)sheng ??(sheng)ju ??(ju)lai ??(lai)de ??(de)fang ??(fang)yu ??(yu)xi ??(xi)tong ??(tong)??，ru ??(ru)tong ??(tong)cheng ??(cheng)bao ??(bao)de ??(de)di ??(di)yi ??(yi)dao ??(dao)cheng ??(cheng)qiang ??(qiang)he ??(he)xun ??(xun)luo ??(luo)wei ??(wei)bing ??(bing)??，neng ??(neng)zai ??(zai)bing ?(bing)yuan ??(yuan)ti ??(ti)ru ??(ru)qin ??(qin)shi ??(shi)xun ??(xun)su ??(su)fan ??(fan)ying ??(ying)??。??