First and foremost, a rise in the money stock necessarily leads to an impairment of the purchasing power of a money unit - compared with a situation in which the money stock remains unchanged.

首先，与货币存量保持不变的情况相比，货币存量的上升必然导致一个货币单位的购买力受损。

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When the general price level rises, each unit of currency buys fewer goods and services, which means the purchasing power of each unit of money is reduced.

当总体价格水平上涨时，单位货币所能够买到的商品和服务就会减少，也就是说，单位货币的购买力下降了。

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The international dollar is a common currency unit that takes into account differences in the relative purchasing power of various currencies.

国际美圆是一个考虑到不同国家货币之间存在购买力的差异而设立的通用货币单位。

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The first is a unit of purchasing power.

ECONOMIST: The UN's Millennium Development Goals

The second is a unit of currency, which has varying purchasing power depending on where it is spent and what it is spent on.

ECONOMIST: The UN's Millennium Development Goals