“population opportunity window”的概念、定义、翻译、参考文献-科学参考

单词	population opportunity window
释义	population opportunity window Encyclopedia 理学人口统计学释 population opportunity window人口机会窗口总人口“中间大，两头小”的结构，使得劳动力供给充足，而且社会负担相对较轻，对社会经济发展十分有利的时期。所谓“中间大”，是指15～64岁的劳动适龄人口规模大；所谓“两头小”，是指0～14岁的青少年人口和65岁及以上的老年人口规模小。
随便看	mapping into itself 「＝mapping in mapping knowledge domains mapping method mapping method of intrusion mapping method of metamorphic rock area mapping method of volcanic rock mapping method with total station mapping norm mapping of class C mapping of geological potential Radon mapping of graphs mapping of pairs mapping of semigroups mapping of sets mapping of spectra mapping of the boundary mapping of the circle mapping of the interval mapping of the sphere mapping of trees mapping onto mapping onto a point mapping onto a set mapping orbit mapping path-space

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