Warning: file_put_contents(/www/wwwroot/ppbbu/62383.com/cache/435fe2644513e1c6bb917eb6e4827455.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/62383.com/index.php on line 55 diolefin是什么意思，diolefin的翻译，diolefin音标、读音、用法和例句_流逝汉英词典
The research of coplymerization of ethylene and conjugated diolefin has theory value as well as practical significance. 乙烯和共扼二烯烃的共聚合的研究不仅具有理论价值而且还有实际意义。