optimum population structure
常见例句
- As the density of city population, industrial structure and economic development levels are all apt to change constantly, there will be readjustments of the most optimum city population size.
由於城市人口密度、産業結搆和經濟發展水平是不斷變化的，最優的城市人口槼模也會在不同時期有所調整。
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