Big basic nitrogen compounds (BNC) molecules poisoned the active sites on external surface of the catalyst, while small BNC molecules entered pore channels of the catalyst, both caused deactivation of the active sites.是什么意思_Big basic nitrogen compounds (BNC) molecules poisoned the active sites on external surface of the catalyst, while small BNC molecules entered pore channels of the catalyst, both caused deactivation of the active sites.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句