lefthandadj.左手的(用左手的；靠左行驶)leftadj.左边的adv.向左n.左边；左派分子；【体】左手拳动词leave的过去式和过去分词形式.left free wall A-V pathway左游离壁房室通道left-hand safety connector左旋安全接头left ventricular minute flow左心室每分流量Left ventricalar hypertrophy左心室肥厚Left main of coronary artery左冠状动脉主干left ventricular endocardium左室内膜left ventricular minute work左心室每分作功量left cusp of semilunar valve左半月瓣瓣尖left anterior division block左前分支阻滞leftmost derivation sequence最左推导序列