名词
中文翻译：历史比率
同义词：
['historic ratio', 'historical ratio', 'historical proportion']
例句：
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1. Thehistorical ratio of the population growth is a key factor in economic planning.
人口增长的历史比率是经济规划的关键因素。
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2.The historical ratio of the population growth has been a topic of debate among economists.
人口增长的历史比率一直是经济学家们争论的话题。
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3.The historical ratio of the population growth is used to estimate future population size.
人口增长的历史比率被用来估计未来的人口规模。