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来源：雅诚德英语网
County X and County Y have similar terrain, but the population density of County X is significantly higher than that of County Y.
X县和Y 县的地形相似，但 X 县的人口密度显著高于 Y 县。
County X and County Y have similar terrain, but the population density of County X is significantly higher than that of County Y.
X县和Y 县的地形相似，但 X 县的人口密度显著高于 Y 县。