copolyalkenamercopolyolefine共聚: copolymerization聚烯烃: [有机化学] polyolefin◇聚烯烃树脂 vistanex低聚烯烃: lower polyolefins高级聚烯烃: higher polyolefins环聚烯烃: cyclopolyolefine下载手机词典可随时随地查词查翻译