primary air一次空气,一次助燃空气,一次风,主空气,一次空气主空气primaryadj.首要的；主要的；初级的；初等教育的；根本的；初期的n.第一位；初选；最主要者；要素；原色；初级线圈primary pulmonary arterial dilatation原发性肺动脉扩张primary standard capacitor microphone基准电容传声器primary copy/backup copy technique基版本/副版本技术primary-level cultural undertakings基层文化建设primary adrenal cortical hypofunction原发性肾上腺皮质功能减退primary degenerative cerebral disease原发性退行性脑病Primary Studies on Transition Economy关于转轨经济的初步研究primary acquired sideroblastic anemia原发性获得性铁粒幼红细胞性贫血primary and secondary school teachers中小学教师Primary Pollutant Discharge by Region各地区主要污染物排放情况