Today, the US is the world’s third most populous country; 50 years from now it is still likely to be third (after only China and India). This is highly relevant to economic power: whereas nearly all other developed countries will face a growing burden of providing for the older generation, immigration could help to attenuate the policy problem for the US.
如今，美国是世界第三大人口大国；50年后，大概仍将排名第三（仅次于中国和印度）。这与经济实力息息相关：几乎所有其他发达国家都将面临日益增加的赡养老龄人口的负担，而移民将有助于解决美国的老龄政策问题。