在建立多孔介质各相质量守恒方程时，液体蒸发量相对于蒸汽相而言为质量源，对液相本身而言为质量汇。
Evaporation quantum of liquid is expressed as mass source for vapor in vapor mass conservation equation, while it is dealt with mass sink for itself.
对微分方程采用控制体积积分方法，因而各物理量均满足守恒型的。
The control volume integral method is used for the differential equations and the integral conservation of each physical quantity is satisfied over the whole domain.
对微分方程采用控制体积积分方法，因而各物理量均满足守恒型的。
The control volume integral method is used for the differential equations and the integral conservation of each physical quantity is satisfied over the whole domain.
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