posteriorityn.后天性；在后posterioradj.(在时间；次序上)较后的n.臀部Posterior urethra rupture后尿道断裂posterior ventral nucleus后腹侧核posterior auricular nerve耳后神经posterior scleral rupture后巩膜posterior alveolar artery后牙槽动脉Posterior wall of stomach胃后壁posterior brachial facies臂后面posterior border position后缘位置posterior nuclear complex后核丛posterior septal arteries室间隔后动脉