The results showed that passivation of the presulfided hydrogenation catalysts was necessary; temperature, concentration of O2, reaction time and expansion rate are important influential factors on the passivation effects.是什么意思_The results showed that passivation of the presulfided hydrogenation catalysts was necessary; temperature, concentration of O2, reaction time and expansion rate are important influential factors on the passivation effects.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句