城市疏散即有机疏散理论，是沙里宁为缓解由于城市过分集中所产生的弊病而提出的关于城市发展及其布局结构的理论。他在1942年出版的《城市：它的发展、衰败和未来》一书就详尽地阐述了这一论理。
把老百姓从被占城市疏散到了农场。
The civilians were evacuated from the occupied city to farms.
国际移民组织称，随着战事越来越接近利比亚首都的黎波里，他们正在执行一项疏散这座城市的数千名外国人的行动。
The International Organisation for Migration says it's planning an operation to evacuate thousands of foreigners from the Libyan capital Tripoli as fighting gets closer to the city.
原因之一，或许是大多数城市比纽约贫穷，而且人口密度疏散，所以难以像它那样让警察遍布街道。
This may be because most cities are poorer and less densely populated than New York, and so find it harder to flood the streets with cops.
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