郊区的这次旅途（费城的人口与1950年相比减少了1/4）留给他们一个贫困的少数对多数，每5个家庭中就有一户属于贫困。
The stampede to the suburbs (Philadelphia has lost a quarter of its population since 1950) has left an impoverished "minority-majority", where one in five families lives in poverty.
每个月人口调查局会代表劳工调查局对6万户家庭进行住户调查，然后将推算结果用于整个美国人口。
Each month the Census Bureau on behalf of the Bureau of Labour Statistics surveys 60,000 households, then extrapolates the results to the entire American population.
每个月人口调查局会代表劳工调查局对6万户家庭进行住户调查，然后将推算结果用于整个美国人口。
Each month the Census Bureau on behalf of the Bureau of Labour Statistics surveys 60, 000 households, then extrapolates the results to the entire American population.
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