单词	pentacarbonyl
释义	pentacarbonyl noun pen·​ta·​carbonyl "+ : a compound containing five carbonyl groups especially combined with a metal Word History Etymology penta- + carbonyl
随便看	progestagen progestational progesterone progesterones progestin progestins progestogen progestogenic progestogens progged proggers progging proglacial proglottic proglottid proglottides proglottids proglottis prognathic prognathism prognathisms prognathous Progne prognes prognosed

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。