demographer [dɪ'mɒɡrəfə(r)]

例句:

• Professor Antonio Golini is a demographer at the University of Rome.
  罗马大学安东尼奥教授是位人口统计学家.
  
• Demographer William Frey says immigrants with young families will help keep the United States competitive.
  人口统计学家佛瑞表示这些年轻的家庭会帮助美国保持竞争力.
  
• William Frey is a demographer at Washington's Brookings Institution.
  来自VOA
• William Frey is a demographer with the Brookings Institution here in Washington.
  来自VOA
• The demographer has long been an advocate of a more liberal policy.
  来自THETIMES