名词
中文翻译：河流分水岭
同义词：
['river divide', 'river demarcation', 'river boundary']
例句：
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1.The river division marks the border between the two countries.
这条河流是两国的分界线。
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2. The river division is a natural barrier that separates the two sides of the river.
这条河流分界线是一条自然屏障，将河流两岸分隔开来。
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3. The river division has been a source of conflict between the two countries for years.
这条河流分界线多年来一直是两国冲突的根源。