常住人口
permanent population
流动人口
floating population
盲流
the unemployed migrant people
劳动力
labor force
外来工
migrant worker
临时工
seasonal worker
人口普查
census
人口基数
population base
人口稠密
densely populated
人口稀少
sparsely populated
人口爆炸
population explosion
人口过剩
overpopulation
出生率
birth rate
死亡率
mortality rate
自然增长率
natural growth rate
人口老化
aging of population
合法婚龄
legal age for marriage
结婚高峰
marriage boom
生育高峰
baby boom period
计划生育
family planning