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关于库页岛地名，请见“萨哈林岛亚历山德罗夫斯克”。落石是指大量岩石从悬崖峭壁上落下。落石产生的原因有震动、植物的根将岩石中的裂隙撑开、岩石裂缝中的水结冰后使岩石破裂、降水使得岩石变重和软化岩石裂缝填充物等原因引发[1]。
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