The recent CERS survey focused on rural roads because crashes in those areas have such a high fatality rate despite the fact that only about 20 percent of the population lives in a rural area.

道路安全研究中心最近的调查主要集中在乡村道路上，因为尽管乡村地区的人口只占全国的20%左右，但在这些地区发生的车祸却有很高的致死率。

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The intermediante level of education of rural-urban black migrants has seved to lower the average level of education in both the black population of origin and the area of destination.

乡-城黑人移民不高不低的教育水平导致来源地（农村）和目的地（城市）黑人的平均教育水平下降。

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The city admitting floating population from rural area increases the supply of workforce in urban area and slows down the aging speed in cities in the near future.

城市接纳农村流动人口，从近期看，可以增加城市劳动力供给，减缓城市老龄化速度，减轻城市抚养比；

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