polyynen.聚炔烃POLYabbr.聚乙烯(=polyethylene)pref.多的；聚合的polymorphic layer多形(细胞)层polymorphic forms多晶型polyvinyl benzene聚苯乙烯polyvinylpyridine聚乙烯基吡啶Polystomammininaen.多口砂虫亚科polybinary coding多二进制编码polycentric order多中心秩序polycyclic relief多循环地形polyurethane urea聚氨酯脲polyglycolic acid聚乙醇酸