New quaternary ammonium salt cationic surfactants with 3 long chain alkyl groups were preparad from 4-alkyldiethylenetriamine and fatty acids through amidation and quaternization.是什么意思_New quaternary ammonium salt cationic surfactants with 3 long chain alkyl groups were preparad from 4-alkyldiethylenetriamine and fatty acids through amidation and quaternization.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句