What happens is that the wind blows the sand up the shallow slope on the other side, and then, as each sand grain hits the top of the ridge, it cascades down on the inside of the crescent, and so the whole horn-shaped dune moves.
风先是将沙子 从坡度较缓的方向吹向另一侧， 沙子会不断机打沙丘脊的顶部， 然后沙子会从沙丘脊部连续不断地落入月牙型的沙丘内部 并且整个号角状的沙丘会随之移动。