名词
中文翻译：出生率同义词
同义词：
['birth rate', 'fertility rate']
例句：
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1. The natality rate in this region has been declining for the past decade.
该地区的出生率在过去十年一直在下降。
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2. The government is trying to increase the natality rate to improve population growth.
政府正试图提高出生率以促进人口增长。
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3. The natality rate is a crucial factor in determining the future size of the population.
出生率是决定未来人口规模的关键因素。