• 1. the population quantity: 人口数量
• 2. Control the quantity of population: 控制人口的数量

• 1.The population quantity is obviously changeable, but population culture construction is behind still.
  人口质量显著改变，但人口文化结构依然落后。
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• 2.Objective The study aimed to learn the population quantity and dynamic of Populus pruinosa in Tarim basin.
  目的了解塔里木盆地灰叶胡杨种群的数量及动态。
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• 3.The result revealed that there was obviously changed in age structure and reproduction structure of L. lagurus with the decline of the population quantity.
  结果表明，随着草原兔尾鼠数量的下降，种群的年龄结构和繁殖结构都发生了明显的变化。
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