The watershed total rainfall is expressed by using double integration.

利用二重积分表示流域降雨总量。

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This stage can be one of double integration or triple integration depending on the number of cultures that the person has to process.

这个阶段是以双重或多重文化综合考量的基础上来理解的阶段。

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The calculation of flow is often needed in water conservancy, and surface-fitting and double integration are usually met in order to solve this problem.

水利行业经常要进行流量计算，这样就会遇到曲面拟合和曲面积分的问题。

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You really think that only retailers who truly understand marketing integration see double-digit growth?

FORBES: The Need For Marketing Integration - The Defense Rests