名词短语
中文翻译：出生率与人口比例
同义词：
['birth rate', 'fertility rate', 'infant mortality rate']
例句：
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1. The government's decision to increase the birth rate has sparked debate among policymakers.
政府决定提高出生率，引发了政策制定者之间的辩论。
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2.The country's fertility rate is declining, which could have significant implications for its future population growth.
该国的生育率正在下降，这可能对其未来人口增长产生重大影响。
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3. Infant mortality rates are a key indicator of a country's health and developmental progress.
婴儿死亡率是衡量一个国家健康和发展水平的关键指标。