positive presence
积极的存在：肯定的在场
例：If the screening results come back positive,showing the presence of hiv antibodies,a western blot is done.
如果检测的结果成阳性,表明hiv病毒抗体在血液中存在,一个蛋白质印迹也就完成了.
positive presence
积极的存在：肯定的在场
例：If the screening results come back positive,showing the presence of hiv antibodies,a western blot is done.
如果检测的结果成阳性,表明hiv病毒抗体在血液中存在,一个蛋白质印迹也就完成了.