人口

• These countries are densely populated .
  这些国家的人口稠密。
• The population is thin in this part of the country .
  该国的那一地区人口稀少。
• Demography is the analysis of population variables .
  人口学是对人口变量的分析。
• The population in this area has increased fourfold .
  该地区的人口已增加到四倍。
• There were many ups and downs in the earth's numbers .
  世界人口数量变化起伏不定。
• Famine decimated the population .
  饥饿使人口大批死亡。
• What is the proportion of men to women in the population ?
  人口中男女的比例是多少？
• In the past, american families tended to be quite large .
  过去，美国家庭的人口众多。
• Texas plumed itself upon its 330, 000 natives .
  得克萨斯沾沾自喜地炫耀自己的33万人口。
• The population of the soviets had decreased by about 600, 000 .
  苏区人口减少了六十万人。