短語詞組短語double e integral 二重積分double photoelectric integral method 雙次光電積分法double trapezoid integral 二重積分double circuit integral 二重圈線積分double Fourier integral 雙重傅里葉積分double -integral iteration method 二次積分迭代法double slope integral amplifier 雙斜率積分時(shí)間擴(kuò)展電路 返回 double integral