For example, economists can plot a relationship between the proportion of the population aged between 35 and 59 (when people save most) and the level of real interest rates.
比方说，经济学家可以画出35岁至59岁人群(存最多钱的一部分人)的比例与实际利率水平的关系曲线。
The problems of the elderly are attracting greater attention largely because the American population is growing steadily older as the proportion of its aged members increases.
老年人的问题正在引起更为广泛的关注，主要是因为随着老年人口比率的增加，美国人口正在逐步趋于老龄化。
The problems of the elderly are attracting greater attention largely because the American population is growing steadily older as the proportion of its aged members increases.
老年人的问题正在引起更为广泛的关注，主要是因为随着老年人口比率的增加，美国人口正在逐步趋于老龄化。
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