As a result of extensive studies, the present inventors found that a pullulan aminoalkyl ether is positively charged in an aqueous solution.是什么意思_As a result of extensive studies, the present inventors found that a pullulan aminoalkyl ether is positively charged in an aqueous solution.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句