Warning: file_put_contents(/www/wwwroot/ppbbu/73904.com/cache/22a69d02a4d14ddbd9406ceb23c83e31.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/73904.com/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_骑士汉英词典
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)