名词
中文翻译：人口平均数
同义词：
['average population', "average number of people例句：1. The government's policy aims to reduce the population mean by 20% within 10 years.（政府的政策旨在在未来10年内将人口平均数减少20%。）"]
例句：
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1. The government's policy aims to reduce the population mean by 20% within 10 years.
政府的政策旨在在未来10年内将人口平均数减少20%。
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2.The city has a population mean of 2 million people.
这个城市有200万人。
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3.The research shows that the average number of people per household in the country is increasing.
研究表明，这个国家每户家庭的平均人数正在增加。