For example, economists can plot a relationship between the proportionof the populationaged 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。
2
The problems of the elderly are attracting greater attention largely because the American population is growing steadily older as the proportionof its aged members increases.