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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。
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singular
singular affine transformation
singular aleph
singular algebraic variety
singular automorphism
singular bilinear form
singular bordism
singular boundary
singular boundary point
singular branch process
singular calculus
singular cardinal
singular cardinal number
singular cardinal problem
singular cardinals hypothesis
singular cardinals hypothesis (SCH)
singular case
singular cell
singular chain
singular chain complex
singular chain group
singular circle
singular cochain
singular cochain complex
singular cocycle
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