短語詞組短語differential -operator inclusion 微分differential evolution operator 差分進化算子fractional differential cover operator 掩模算子differential extremum operator 差分極值算子integro -differential recursion operator 積分elliptic differential operator [數(shù)]橢圓型微分算子partial differential operator [數(shù)]偏微分算子adjoint differential operator [數(shù)]伴隨微分算子weak differential operator [數(shù)]弱微分算子 返回 differential operator