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.

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在建筑物密集区域，限速为每小时30英里。

A speed limit of 30 mph was introduced in built-up areas.

《柯林斯英汉双解大词典》

据布莱克曼说，海地是个贫穷的国家，建筑标准松散，人口高度密集，其建筑更有可能倒塌。

Haiti is a poor country with lax building standards and high population density, which makes buildings more likely to crumble, according to Blakeman.

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