或许对人们的人口问题最简单的摘要是这样：如果要说道理的话，公地只可以在低人口密度的条件下成立。
Perhaps the simplest summary of this analysis of man's population problems is this: the Commons, if justifiable at all, is justifiable only under conditions of low-population density.
[摘要]随着人口平均寿命的延长，系统性的长寿风险正在逐步成为理论界和保险业关注的热点。
Abstract: As the extension of the population's life expectancy, the systemic longevity risk is drawing more and more attention from the researchers and the insurance industry.
[摘要]随着老年人口增多，农村医疗支出也会增加。
Abstract: Rural residents' medical expenditure will increase notably as the surge in the elderly population.
应用推荐