那使我们的结果不易受社会和经济因素的影响。

That makes our results less sensitive to the influence of social and economic factors.

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判断不同国家结核病发病率趋势的差异是否可归咎于结核控制规划的成效或生物学、社会和经济因素。

To determine whether differences in national trends in tuberculosis incidence are attributable to the variable success of control programmes or to biological, social and economic factors.

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为了做出更准确的人口预测，人口统计学家必须比现在更多地了解生育率的社会和经济决定因素。

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

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