The olefines (mainly C4 olefines)in the liquefied petroleum gas under the action of a selective catalyst were polymerized to form heigher molecular weight diners and trimers.是什么意思_The olefines (mainly C4 olefines)in the liquefied petroleum gas under the action of a selective catalyst were polymerized to form heigher molecular weight diners and trimers.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句