更多的富裕国家有日益扩大的城市贫民区和棚户区，对卫生资源和社会福利制度造成很大负担。
More wealthy countries have growing urban slums and shantytowns that drain health resources and strain the social welfare systems.
除非乡村能提供不错的工作机会，否则无论棚户区的条件是多么恶劣，城市的诱惑就依然存在。
Until the countryside offers a decent living, the lure of the city will remain, however awful the shanty-towns.
这些城市中的难民只能栖身于拥挤的贫民窟或棚户区，很少甚至根本无法享有医疗保健和社会服务。
Forced to live in overcrowded slums or shantytowns, city-dwelling refugees have little or no access to health care or social services.
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