Warning: file_put_contents(/www/wwwroot/ppbbu/bieo.cn/cache/cf8f76099e61652c663d902ab6c3fe56.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/bieo.cn/index.php on line 58 butene英英字典_butene剑桥英语解释_butene柯林斯英文解释_衣物護欧路词典
1. N a pungent colourless gas existing in four isomeric forms, all of which are used in the manufacture of organic compounds. Formula: C4H8 丁烯 (Also called butylene)