It presents an overview of demographic trends worldwide, including those on population size and growth; urbanization and city growth; population ageing; fertility and contraception; mortality, and international migration.
该书概述了全世界的人口趋势，包括人口数量和增长的趋势；城市化和城市发展；人口老龄化、生育率与节育；死亡率与国际移徙。