名词
中文翻译：出生率
同义词：
['infant_mortality_rate', 'fertility_rate']
例句：
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1.The government is trying to reduce the birth rate in order to control population growth.
政府正试图降低出生率以控制人口增长。
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2.The study found a correlation between the birth rate and the economic development of a region.
研究发现出生率与该地区的经济发展之间存在相关性。
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3. The decline in birth rates has led to an increase in the number of single-parent families.
出生率的下降导致单亲家庭数量的增加。