地理漫步·世界地理英语30篇（8）
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Scale Shifts Change How We See Geographic Features
尺度转换改变我们观察地理要素的方式
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A single sand dune looks small from the ground.单个沙丘从地面看很小。
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From space, dunes form vast, repeating wave patterns.从太空看，沙丘形成广阔而重复的波状图案。
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A city block feels crowded, but its heat effect spreads miles.一个城市街区感觉拥挤，但其热效应却能扩散数英里。
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A river bend matters locally; its delta shapes a whole coast.河流弯道在局部很重要；其三角洲则塑造整条海岸线。
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Satellite views reveal forest loss across continents.卫星影像揭示出横跨大陆的森林消失。
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Fieldwork shows how soil layers vary centimeter by centimeter.野外考察显示土壤层以厘米为单位逐层变化。
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Geographers switch scales to understand cause and effect.地理学家通过切换尺度来理解因果关系。
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What looks like noise at one scale becomes pattern at another.在一个尺度上看似杂乱无章的现象，在另一尺度上却成为规律。