“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	device protection devices and instruments for stomatology device set condition devices for accelerating germinations devices for powder aerosols devices of first aid and treatment for heart devices to aid reverse manoeuvers-extended-range backing aid systems device testing of flue gas denitration device testing of flue gas desulfurization devide line Devil De Villedieu devil on two sticks Devils on the Doorstep devil's staircase devil staircase devil’s curve devil’s needle puzzle devil’s number devil’s pitchfork devil’s staircase devise Devised Theatre Devising devissage theorem

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