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 medullary ray初生髓射线
primary relay station第一级转报站
primary liquid trough原液槽
primary digital group数字基群
primary visual center初级视中枢
primary circuit route主路由
primary electron beam原始电子束
Primary Recovery Site主回收地点
primary tympanoplasty一期鼓室成形术
Primary dysmenorrheal原发性痛经