The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.

黄土丘陵区的沟沿线，是反映该区地形地貌特征的重要的地形结构线。

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The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.

黄土丘陵区的沟沿线，是反映该区地形地貌特征的重要的地形结构线。

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