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 hypotonic uterine dysfunction原发性低张力性子宫功能不良primary and secondary school students中小学生primary strut of subperiosteal implant骨膜下植入体主要支柱Primary and secondary supporting zones主次承载区primary lymphocyte antigen interaction一级淋巴细胞抗原相互作用Primary Navigation and Guidance System初级导航及制导系统Primary papillary carcinoma of thyroid甲状腺原发性乳头状癌Primary cerebroventricular haemorrhage原发性脑室出血primary and secondary school textbooks中小学教科书primary acute angle-closure glaucoma原发性急性闭角型青光眼