With higher life expectancy and lower birth rate, South Korea is becoming an aging nation.

韩国较高的平均寿命以及较低的出生率使韩国一步一步走向老龄化。

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In an aging nation, Sardinia's population is especially old, with one of the world's highest ratios of people over a hundred years old.

在老年化国家，撒丁岛的人口尤其老，那里的百岁老人所占比率为世界最高。

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Proponents of public-private partnerships argue that the nation's aging infrastructure needs repair broadly and modernization.

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But during the recession, the nation's aging air traffic system has enjoyed a reprieve in the form of sagging ridership.

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Reopening a fight with Congress that he lost in his first term, he called for tens of billions in spending to rebuild the nation's aging roads and bridges.

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