Producing ethylene through oxidative coupling of methane(OCM)is the main focus in natural gas conversion field in the world since 1980s.是什么意思_Producing ethylene through oxidative coupling of methane(OCM)is the main focus in natural gas conversion field in the world since 1980s.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句