The undulating mountains look like an ink-wash painting.
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山峦 is more literary than 山 (mountain) or 山脉 (mountain chain). It evokes scenic, rolling, layered ranges — common in landscape poetry, travel writing, and descriptive prose.
memory
峦 (luán) is built from 山 (mountain) on the bottom plus 亦 — think of 山 stacked beneath, suggesting layered peaks. 山峦 = mountain plus mountain-of-mountains.
