Warning: file_put_contents(): Only 0 of 7259 bytes written, possibly out of free disk space in /home/www/wwwroot/ndsq.cn/index.php on line 55 butene英英字典_butene剑桥英语解释_butene柯林斯英文解释_开心英文字典_柠咚词
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)