The polymer was prepared by copolymerizing vinyl sulfonate, methyl methacrylate( MMA) and methacrylic acid( MAA) in different proportions.是什么意思_The polymer was prepared by copolymerizing vinyl sulfonate, methyl methacrylate( MMA) and methacrylic acid( MAA) in different proportions.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句