You've exchanged one currency for another.

你已经将一种货币兑换成另一种货币。

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You can select more than one currency code.

可以选择多个货币代码。

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One currency that did not is the Swiss franc (see right-hand chart).

有一种货币没有下滑，那就是瑞士法郎（参见上图右表）。

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One is the issuing of $250 billion worth of the IMF reserve currency, called Special Drawing Rights, or SDRs, to nations needing funding against the effects of the global financial downturn.

VOA: standard.2009.04.20

Firms whose inputs are denominated in one currency and their outputs in another frequently get jilted.

FORBES: You Call It Inflation, I Call It Theft

The intergovernmental model in which one currency is backed by 17 sovereign nations is surely obsolete.

WSJ: France Is Biggest Obstacle to Solution

And just as you don't need more than one currency circulating in a domestic economy, so you don't need more than one global reserve currency.

ECONOMIST: The dollar's dive