demographer

名词 demographer:

1. a scientist who studies the growth and density of populations and their vital statistics
   同义词：demographist, population scientist

1. Demographers and geographers attribute the slowing largely to the recession, which has hit California particularly hard, leaving its once-robust economy to bring up the rear of the national recovery.
   人口学家和地理学家把缓慢的情形都归咎于不景气，加州情形尤为严重，以致加州一度蓬勃的经济竟然在全国复苏中落在各州之后。