A—overpopulation B—under population
C—working population D—population waiting for employment
E— population F—rural population
G—population reproduction H—population increase
I—population decrease J—population base
K—population distribution L—population density
M—population quality N—population pyramid
O—population statistics P—population theory
Q—population studies

A—overpopulation B—under population
C—working population D—population waiting for employment
E— population F—rural population
G—population reproduction H—population increase
I—population decrease J—population base
K—population distribution L—population density
M—population quality N—population pyramid
O—population statistics P—population theory
Q—population studies（）在业人口（）人口密度

A—overpopulation B—under population
C—working population D—population waiting for employment
E— population F—rural population
G—population reproduction H—population increase
I—population decrease J—population base
K—population distribution L—population density
M—population quality N—population pyramid
O—population statistics P—population theory
Q—population studies