polymethylene derivatives聚: assemble; gather; get togeth ...甲: the first of the ten Heavenl ...烯: alkene; olefince衍生物: derivative; derivant; deriva ...链烯衍生物: alkano-derivatives下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:聚甲烯衍生物，即可在微信中查询翻译
