The sand box model is a reduced scale representation of the natural porous medium domain.
砂槽模型是将天然的多孔介质区域按比例缩小的模型。
The sand box model is a reduced scale representation of the natural porous medium domain.
槽模型是将天然的多孔介质区域按比例缩小的模型。
The crop model of the modern small-scale peasant economy is decided by the following factors:first of all, the natural constraints on the choice of crops;
近代小农经济的作物模式主要受到以下几个方面因素的影响：首先，自然环境对作物选择的制约；
The crop model of the modern small-scale peasant economy is decided by the following factors:first of all, the natural constraints on the choice of crops;
近代小农经济的作物模式主要受到以下几个方面因素的影响：首先，自然环境对作物选择的制约；
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