他希望将他的市民都聚集起来，而不是鼓励人们离开这个地方，促进地区的人口密度在经济上依旧是可行的。
He would like to concentrate his citizens, boosting the population density in areas that are still economically viable, while encouraging people to move out of districts that are not.
社会经济状况、公厕密度、人口密度以及研究年份都未对患病风险产生重大影响。
Neither socioeconomic status, latrine density, population density nor study year had a significant influence on disease risk.
荷兰，一个丰饶且人口密度较大的北欧小国，国内经济十分脆弱，平静的表面下种族冲突危机四伏。
MEET the Netherlands. A small, affluent, densely populated northern European country, economically timid, with the potential for ethnic strife simmering just under its quiet surface.
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