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山峦起伏。
The mountain ranges rise and fall.
《新英汉大辞典》
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该地区山峦起伏，植被稀少，土地脊薄。
This area undulating hills, vegetation is exiguous, land backbone is thin.
youdao
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远方是一片白雪皑皑、山峦起伏、寒风凛冽的冬季景色。
On the far side was a winterscape of deep snow, mountain vistas and blowing wind.
youdao