请输入您要查询的字词:
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
curtailed inspection
curtailment
curtain
curtain accessories
curtain cloth
curtain components
curtain fig
curtain gauze
curtain grouting
curtain grouting treatment
curtain hung over the doorway between front and back stages
curtain painting
curtain shutter
Curtains of Han,Wei and Jin Dynasty
curtain wall
curtain wall engineering
curtain wall technology
curtate cissoid
curtate cycloid
curtate cycloid evolute
curtate distance
curtate epicycloid
curtate hypocycloid
curtate trochoid
Curtin Hammett principal
科学参考收录了854744条科技类词条,基本涵盖了常见科技类参考文献及英语词汇的翻译,是科学学习和研究的有利工具。
Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号
更新时间:2025/7/29 20:53:55