The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.
黄土丘陵区沟沿,是反映该区形貌特征重要形结。
The thalweg in loess hill area is an important terrain structural line, reflecting topography and landform character.
黄土丘陵区沟沿,是反映该区形貌特征重要形结。
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