An equation of exchange fraction is.

系统地导出了交换度方程。

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The heat balance equation of an element of ground surface including the term of latent heat exchange was presented.

提出了含蒸发潜热能量交换项的地表单元能量热平衡方程，并采取了温度线性化的处理。

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By utilizing model of dynamic adjustment, we construct foreign exchange reserve equation to judge whether foreign exchange reserve is adequate or surplus.

在此基础上利用动态调整模型确定我国的外汇储备需求方程，并依此来判断我国所持有的外汇储备规模。

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