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The river forms a natural boundary between the two countries.
那条河在这两个国家之间形成一条自然边界。
youdao
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Thee river is the boundary between the two countries.
这条河是两国的分界线。
youdao
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A river forms the boundary line between the two countries.
河流形成了两国的边界。
youdao
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A river forms the boundary line between the two countries.
河流形成了两国的边界。
youdao