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A rapidly ageing population in many countries is also a contributing factor.
许多国家人口迅速老龄化也是一个促进因素。
youdao
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Germany's population is ageing, and the birth rate falling.
德国的人口老化，出生率下降。
youdao
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Germany's population is ageing, and the birth rate falling.
德国的人口老化，出生率下降。
youdao