purchasing power[U]
(a) wealth and the ability to buy goods with it (人的)购买力
Inflation reduces the purchasing power of people living on fixed incomes. 靠固定收入生活的人其购买力因通货膨胀而下降.
(b) value (of a unit of money) in terms of what it can buy (货币的)购买力
a decline in the purchasing power of the dollar 美元的贬值.