他们也发现北极地区的阵风有足够力量移动沙丘的证据。
They also found evidence that wind gusts in the northern polar region are strong enough to move grains of sand.
纳米布沙漠是世界最大的移动沙丘所在地，高近千英尺。
The Namib Desert is home to the world's biggest migrating dunes, which reach heights of nearly a thousand feet.
沙尘暴能见度经常很低以至于看不见太阳，风有时得能移动沙丘。
They are so thick that you cannot see the sun, and the wind is sometimes strong enough to move sand dunes.
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