primary gun主炮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 product trade初级产品贸易primary raw materials初级原料Primary reproductives原始繁殖蚁primary porta hepatis第一肝门primary cardiomyocyte原代心肌细胞Primary demyelination原发性脱髓鞘primary sewage sludge原下水污泥primary inertia force原惯力primary manufacturing初加工primary consolidation初始固结,主固结,初期固结