By Na2CO3 or K2CO3 as catalyst,the phenolic resin possesses the highest remaining carbon when the molar ratio of formaldehyde and phenol is from 1.35 to 1.37.是什么意思_By Na2CO3 or K2CO3 as catalyst,the phenolic resin possesses the highest remaining carbon when the molar ratio of formaldehyde and phenol is from 1.35 to 1.37.在线翻译_英语_读音_用法_例句