短語詞組短語quadratic Pad é approximation 二次Padé逼近quadratic approximation method 二次逼近法method of quadratic approximation [數(shù)]平方逼近法optimal quadratic approximation 最佳平方逼近delta -gamma quadratic approximation method gamma二次近似法quadratic Hermite -Padé approximation 二次Hermiteapproximation in quadratic norm 平方逼近 返回 quadratic approximation