Some scholars argue that the concentration of water within the urban core of these sites provided a centralized source of political authority for Maya elites based largely on controlled water access.

一些学者认为，集中在这些地点的城市核心区的水资源为玛雅精英提供了一个集中的政治权力来源，而这些权力主要是基于对水资源的控制。

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The proposal advocated the creation of urban villages at hundreds of sites, mostly around railway stations.

该提案主张在数百个地点建立城中村，主要建在火车站周围。

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The plan will also offer small, subsidised plots of land in new sites with access to roads and sanitation, and promote vertical building in some urban areas.

计划还提供配备有公路和医疗设施的小型地块，并提供一定的津贴，以鼓励他们在一些城市进行垂直建设。

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Edwin Heathcote, author of the Meaning of Home, says that the volume housebuilders "try to squeeze in" as many units as they can into urban sites.

BBC: A life lived in tiny flats

But not all urban sites should be written off.

CNN: Can 'small wind' reap big rewards?

For the 2012 observance of National HIV Testing Day, June 27, the Centers for Disease Control and Prevention has announced a new pilot project to train pharmacists and retail store clinic staff at 12 rural and 12 urban sites to provide voluntary, confidential, rapid HIV testing.

WHITEHOUSE: Today Is National HIV Testing Day