the

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The heaviest sand rises only a few metres above the ground,
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The heaviest sand rises only a few metres above the ground, 最重的沙子只能离开地面几米

but the dust can be blown 5,000 metres up into the sky.
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but the dust can be blown 5,000 metres up into the sky. 但是尘埃却能被吹上5000多米高的天空

The ferocious wind, armed with grains of sand,
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The ferocious wind, armed with grains of sand, 夹杂着沙粒的强风

is the agent that shapes all deserts.
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is the agent that shapes all deserts. 塑造了各种沙漠地形

and reduce visibility for days over areas the size of Britain.
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and reduce visibility for days over areas the size of Britain. 所到之处能见度骤降为零 几天内横扫的地区比英国还大

strange formations are exposed in the naked rock.
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strange formations are exposed in the naked rock. 裸露的岩石显露出奇特的造型

Africa's Sahara is the largest desert of all.
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Africa's Sahara is the largest desert of all. 非洲的撒哈拉沙漠是世界上最大的沙漠

It's the size of the United States
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It's the size of the United States 它的面积相当于美国

and the biggest source of sand and dust in the entire world.
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and the biggest source of sand and dust in the entire world. 也是全世界最大的沙尘源

leaving little for the land on the other side.
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leaving little for the land on the other side. 只有一小部分到达另一边的土地