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.

辞典例句

He heard the Johnson boy next door, playing in his sand box, making race car noises.

他听到隔壁男孩约翰正在他的沙地里玩儿, 发出赛车的声音.

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