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

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。

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Besides having a high energy density, the long chains of hydrocarbons are also good building blocks for constructing more complex molecules, such as plastics and pharmaceutical drugs.

除含有高能量外，长链碳氢化合物也适合构建更复杂的分子，如塑料和药品。

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The two linked towers feature cantilevered balconies with irregular edges that disrupt the density of the building and provide areas where residents can look up, unimpeded, towards the sky.

两个连接的塔楼有悬挑的不规则边缘阳台，打乱了建筑的密度，居民可以向上、畅通无阻地欣赏天空的美景。

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The government has already produced revised planning guidance on the need for higher-density building in cities.

ECONOMIST: The pre-budget report

The need for higher-density urban building has already been reflected in new planning guidance.

ECONOMIST: Cities

Its main city, Portland, became the poster child of the "smart growth" movement by forcing up density, building an extensive light-rail system and restoring its urban core.

FORBES: New Geographer