calculation of indefinite integral 不定积分的计算
approximate calculation of multiple integral [数] 多重积分近似计算
numerical calculation of multiple integral [数] 多重积分数值计算
calculation of multiple integral 重积分计算
The theoretical investigation in ionic fluids has been done with analytical or numerical calculation of integral equations.
对于离子液体的研究理论上主要是用解析或数值计算求解积分方程组。
This paper gives some approximate formulas of the integral average value for experimental calculation on the basis of the integral mean law. Examples are given for explanation.
本文依据积分中值定理给出了适宜于实验计算的积分平均值的近似公式，并举例加以说明。
As mentioned earlier, one of the applications of the integral is the calculation of area. Ordinarily, we do not talk about area by itself, instead, we talk about the area of something.
就像前面提到的，积分的一个应用就是面积的计算，通常我们不讨论面积本身，相反，是讨论某事物的面积。
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