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.
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.
目前对飞船只进行了一些低海拔的飞行测试，平流层的测试则仅仅是由气象探测气球负载着规模缩小的模型原型机来进行的。
So far, apart from some low-altitude test flights, the only stratospheric tests have involved a scaled-down version tethered to a weather balloon.
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