共和党需要承认，随着美国人口日益老龄化，维持充足的公共供给需要(这种需要几乎等同算术意义上的必需)更多的税收收入。
Republicans need to admit that maintaining adequate public provision as the population ages requires, almost as a matter of arithmetical necessity, more revenues.
美国人口普查局的一份最新报告显著表明，人口发生了巨大的转变，不仅是趋于老化而且是进入老龄化，对富裕及贫穷国家都同样具有难以应付的影响。
A new report by the us census bureau highlights a huge shift towards not just an ageing but an old population, with formidable consequences for rich and poor nations alike.
老年人的问题正在引起更为广泛的关注，主要是因为随着老年人口比率的增加，美国人口正在逐步趋于老龄化。
The problems of the elderly are attracting greater attention largely because the American population is growing steadily older as the proportion of its aged members increases.
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