短期内，人口生育率冲击会增加人口总量，并提高抚养系数。
In the short run, the fertility shock will increase population and makes the young dependency rate higher.
由于农村地区的年轻人移居城镇，把老年人滞留在农村，农村地区的抚养系数将会比城市的抚养系数上升幅度更大。
In rural areas the dependency ratio will rise far more steeply than in cities as young people move out and the elderly stay behind.
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