Leftere莱夫特雷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 superior rectus左上直肌left ventricular wall左心室壁left simple semigroup左单半群left- behind family留守家庭Left lower lobe mucus左肺下叶粘液left homotopy inverse同伦逆元left frontotransverse左额横位(胎位)left auricle of heart左心耳left flexure of colon结肠脾曲,结肠左曲left ventricle volume左室容量