名词
中文翻译：自然人口增长
同义词：
['population growth', 'natural increase']
例句：
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1. The government is concerned aboutthe natural population increase in the city.
政府对城市自然人口增长感到担忧。
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2. Theresearchers found that the natural population increase wasdue to improved living conditions.
研究人员发现，自然人口增长是由于改善了生活条件。
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3.The natural population increase has been a concernfor many years.
多年来，自然人口增长一直是许多人的担忧。