Left ear左耳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 ventricular systolic index左心室收缩指数left-handed transmission peak左手透射峰left medio-lateral episiotomy左中侧会阴切开术LEFT DOWNWARDS PUNCH WITH STEPS走步单栽拳发力left ventricular wall thickness左心室壁厚度Left ventricular fold of larynx喉左室襞left ventricular pseudoaneurysm左心室假性室壁瘤Left-handed transmission line左手传输线left-handed coordinate system左旋坐标系,左手坐标系left-bracketed representation左括号表示