短語詞組短語the degree of substitution 取代度molar degree of substitution 摩爾取代度high degree of substitution 高取代度low degree of substitution 低取代度DS degree of substitution 衍生物取代度degree of substitution distribution 取代度分布higher degree of substitution 高取代度degree of substitution ds 取代度low degree of substitution carboxymethylcellulose 低取代度羧甲基纖維素 返回 degree of substitution