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原標(biāo)題：五月天婷婷激情无码专区

　　T細(xì)?(xi)胞??(bao)的?(de)角??(jiao)色??(se)則??(ze)是??(shi)指??(zhi)揮??(hui)、“殺??(sha)敵??(di)”與??(yu)“維??(wei)穩(wěn)??(wen)”??。??比?(bi)如??(ru)輔?(fu)助??(zhu)T細(xì)??(xi)胞??(bao)??，扮??(ban)演??(yan)著?(zhe)“指??(zhi)揮??(hui)官??(guan)”角??(jiao)色??(se)??，通??(tong)過??(guo)釋??(shi)放??(fang)細(xì)??(xi)胞??(bao)因??(yin)子??(zi)??，激??(ji)活??(huo)B細(xì)??(xi)胞??(bao)和??(he)其??(qi)他??(ta)免??(mian)疫??(yi)細(xì)??(xi)胞?(bao)；細(xì)??(xi)胞??(bao)毒??(du)性??(xing)T細(xì)??(xi)胞??(bao)??，扮??(ban)演??(yan)著??(zhe)“殺??(sha)手??(shou)”角??(jiao)色??(se)??，直??(zhi)接??(jie)穿??(chuan)透??(tou)感??(gan)染??(ran)細(xì)?(xi)胞??(bao)??，注??(zhu)入?(ru)毒??(du)素??(su)將??(jiang)其??(qi)摧?(cui)毀??(hui)；調(diào)??(tiao)節(jié)?(jie)T細(xì)??(xi)胞?(bao)??，扮??(ban)演??(yan)著??(zhe)“維??(wei)穩(wěn)??(wen)員??(yuan)”角?(jiao)色??(se)??，防??(fang)止??(zhi)免??(mian)疫??(yi)反??(fan)應(yīng)??(ying)過?(guo)度?(du)??，避??(bi)免??(mian)誤?(wu)傷??(shang)健??(jian)康??(kang)組??(zu)織??(zhi)??。　　免??(mian)疫??(yi)系??(xi)統(tǒng)??(tong)的?(de)核??(he)心??(xin)使??(shi)命??(ming)不??(bu)是??(shi)“消??(xiao)滅??(mie)一??(yi)切??(qie)”??，而??(er)是??(shi)識(shí)??(shi)別??(bie)敵??(di)我??(wo)、清??(qing)除??(chu)威??(wei)脅??(xie)??。??。