基本解释外膜同根派生 英汉例句The gland wall is a continuation of the carotid wall and consists of intima, media and extima. 组织结构显示：颈动脉腺的外壁是动脉管壁的延续，包括外膜、中膜和内膜。tunica extima [医] 外膜(血管)