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来源:雅诚德英语网
Urban areas have a density of human structures such as houses, commercial buildings, roads and bridges.
城市地区有密集的人类建筑,如房屋、商业建筑、道路和桥梁。
Urban areas have a density of human structures such as houses, commercial buildings, roads and bridges.
城市地区有密集的人类建筑,如房屋、商业建筑、道路和桥梁。