How Sand Dunes Move Across Deserts — And Why Some Stay Still
沙丘如何在沙漠中移动,又为何有些沙丘保持静止?
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Wind pushes sand grains along the ground in a process called saltation, gradually reshaping dune forms over time.
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The speed and direction of prevailing winds determine whether dunes migrate, rotate, or remain anchored.
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