“少子化”的概念、定义、翻译、参考文献-科学参考

单词	少子化
释义	少子化 Encyclopedia 理学人口统计学释 babybust少子化一个社会中随着人口总和生育率下降，少年儿童（0-14岁）占总人口比重降低的现象。一般将一个国家的总和生育率长时间低于维持人口长期稳定发展的更替水平（2.1），界定为少子化。
随便看	charge transfer state charge-transfer state charge transfer state, charge-transfer state charge transfer transition charge transport charge trap flash charge velocity charge volume of grinding mill chargiability charging charging and discharging effect charging and swapping station of electric vehicle charging and swapping technology of electric vehicle charging coefficient of warhead charging cross the district charging current charging/discharge current charging/discharge rate charging document charging energy charging load charging of span period charging supply charging system of raw materials for blast furnace charging time constant

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