词汇建立 Vocabulary Building
汇出时不建立图层和块 NONE
词汇网络的建立 building of word net-works
建立汇总 Create Summarization
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.
基于面元法，通过在回转体和空泡表面分布源汇的方法，建立了求解轴对称回转体局部空泡流场的数学模型。
Based on panel method, the mathematic model of partial-cavity flow field for axisymmetric body is given by use of the sources of distributing on the bodies and cavity surfaces.
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