原因是显而易见的：美国的人口老龄化意味着更多工作机会。
人口变化是劳动力老龄化的又一原因。
Demographic change is another reason why the workforce is greying.
许多日本人对老龄化问题不以为然，部分原因是因为老年人们继续靠着大量的储蓄过着舒适的生活。
Many in Japan shrug off the problem of ageing. That is partly because the elderly continue to live comfortably on their vast hoard of savings.
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