The region is thickly peopled.
The world population goes up by two percent a year.世界人口每年增加2%。
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今天的几个句子是有关人口的：1.The region is thickly peopled. 这地区人口稠密。2.There was a steady increase in population. 人口在不断增长中。3.The country has a population of 100 million. 这个国家有一亿人口。
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