名词
中文翻译：Unknown
同义词：
['average age of childbearing', 'average age at marriage', 'average age at first birth例句：1. The study found that the mean age at childbearing in this country is increasing.（研究发现，这个国家的生育平均年龄正在上升。）2. The policy aims to reduce the mean age at childbearing and increase the number of children born outside the country.（该政策旨在降低生育平均年龄并增加在国外出生的孩子数量。）']
例句：
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1. The study found that the mean age at childbearing in this country is increasing.
研究发现，这个国家的生育平均年龄正在上升。
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2. The policy aims to reduce the mean age at childbearing and increase the number of children born outside the country.
该政策旨在降低生育平均年龄并增加在国外出生的孩子数量。
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3. The researchers analyzed data from various countries to find out the mean age at childbearing for women in different regions.
研究人员分析了来自不同地区的数据，以找出女性生育的平均年龄。