posterior view后位(象)posterioradj.(在时间；次序上)较后的n.臀部Posterior subcapsular polar cataract后囊下极内障posterior belly of digastric muscles二腹肌后腹posterior sacrail sagittal anoplasty骶后纵切肛门成形术posterior inferior cerebellar artery小脑下后动脉posterior spinal fusion and fixation后路融合固定Posterior fossa compression syndrome后颅凹受压综合征Posterior leaflet of tricuspid valve三尖瓣后小叶posterior cutaneous nerve of forearm前臂后皮神经Posterior surface of lower extremity下肢后面Posterior commissure of mitral valve二尖瓣后联合