The results of TPR indicated that metal sulfides were the hydrogenation centers, after presulfiding the acid strength of catalyst increased, but the total acid quantity reduced.是什么意思_The results of TPR indicated that metal sulfides were the hydrogenation centers, after presulfiding the acid strength of catalyst increased, but the total acid quantity reduced.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句