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抚养比
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抚养比
Encyclopedia
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年龄
释
dependency ratio
抚养比
人口中非劳动年龄人口数与劳动年龄人口数之比。又称抚养系数或负担系数。用百分比表示。
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mixing ratio
mixing rule of composite materials
mixing stochastic process
mixing tank of coordination treatment of phosphate
mixing theorem
mixing time
mixing transformation
Mixizi
mixmaster universe
mix of different types of staff
mix oil interface detection
mixoploid
mixoploidy
MIXPC turbocharging system
mix phase
mix style
Mixtec
mixtilinear circle
mixtilinear incircles
mixtilinear triangle
mixture
mixture boiling
mixture by tree group
mixture connection
mixture design
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