population

• The world population goes up by two percent a year .
  世界人口每年增加2。
• The population density is evened out .
  种群密度亦趋于均匀化。
• 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。
• Famine decimated the population .
  饥饿使人口大批死亡。
• How do the populations maintain this homeostasis ?
  种群如何能维持这种内稳定状态呢？
• These stars are sometimes called population ii stars .
  这些恒星有时称为星族恒星。
• What is the proportion of men to women in the population ?
  人口中男女的比例是多少？
• Our foreign population is growing .
  外来人口在增长。