| 释义 |
平均期望寿命píngjūn qīwàng shòumìng人口学中反映人寿命长短的统计指标之一。指人活到某一年龄后还能继续生存的平均年数。出生时的平均期望寿命常简称为平均寿命。社会经济水平的提高,生活条件的改善,医疗卫生事业的发展,使死亡率降低,平均期望寿命增高。{average life expectancy; one of the statistical indices for life expectancy in demography; average expected number of years in man's life after reaching a given age. The average life expectancy at birth is also called ‘average lifespan’ for short. The rise of social economic level, the improvement of living conditions and the development of medical service and public health lead to a drop in the mortality rate and a rise in the average life expectancy.} |