人口老龄化aging of population 出生率birth rate

全国人口普查nationwide census

人口激增population explosion

预期寿命life expectancy

社会公益活动public welfare activity

活动中心 recreational center

道德标准ethical standard

尊老爱幼respect the old and cherish the young

退休金pension

敬老院home for the aged

老年大学university for the aged养老金old-age pension 社会保险social insurance

人寿保险life insurance 多元文化论multiculturalism

社会保障social security