leftismn.左翼主义；急进主义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 posterior coelom左后体腔left-right guidance左右制导left ventricular apex左室心尖left alternative ring左交错环left-hand projector左手放映机left margin detection左空白检测left cancellation law[计] 左消去法则left-wing coalition左翼联盟left thyoid lobectomy甲状腺左叶切除术Left colonic neoplasm左半结肠癌