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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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Population ageing is one of the most important problems is the world.
人口老化是当今世界最重要的问题之一。
youdao
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Population ageing is one of the most important problems is the world.
人口老化是当今世界最重要的问题之一。
youdao