“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	X-ray region of energy states X-ray-rich GRB X-ray rotation photograph X-ray satellite X-ray scattering X-ray security inspection equipment X-ray sensor X-ray single crystal diffraction analysis for pharmaceutics X-ray single crystal diffractometer X-ray sky X-ray sky background X-ray source Xray source X-ray space astronomy X-ray space telescope X-ray spectrograph X-ray spectrometer X-ray spectroscopy X-ray spectrum X-ray star X-ray storage luminescent material X-ray storage phosphor Xray storage phosphor X-ray structural biology X-ray Structure Analysis

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