The winds create the dunes by dropping loose sand onto land.

强风形成沙丘的方式是将松散的沙子散落到土地上。

On the  other hand, loose sand is like glass.

另一方面，松散的沙子就像玻璃一样。

And Fremier says when she builds it, she basically unpacks the stream bed, making all those loose sands and gravels more mobile.

弗莱米尔表示，雌性鲑鱼挖好洞以后会在河床上产卵，让所有散沙和碎石更易流动。

The beating of the rain on this rock washes the grains apart, and so the hard sandstone slowly changes into loose sand.

当雨水打下来的时候, 这种岩石中的沙粒便被冲刷下来。久而久之, 坚硬的砂岩逐渐变成了松散的沙子。

The billowing we now saw was loose white sand moving along the embankment ahead of a high wind.

我们现在看到的滚滚是松散的白色沙子在大风前沿着堤岸移动。