The real purchasing power of the rouble has plummeted.

卢布的实际购买力已直线下降。

《柯林斯英汉双解大词典》

Inflation does not in itself reduce people's real purchasing power.

通货膨胀本身并不减少人们的实际购买力。

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In this way, the PPP calculation gives us a better understanding of the real purchasing power of incomes in various societies.

以此方式，PPP的计算方式能让我们更好地了解到各种各样社会环境下收入的真实购买力。

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This would leave him with 3% less real purchasing power than he has under the current tax system.

FORBES: Why Do The Economic Proposals Of Perry, Romney And Cain Terrify Liberals?

In reality, this path simply represents just another form of default, as creditors will ultimately be paid back in currencies that are worth less in terms of real purchasing power.

FORBES: The Deleveraging Conundrum

Indeed, they are more burdensome, because Congress has, explicitly or implicitly, promised to pay these benefits off in real (purchasing power) terms.

FORBES: Magazine Article