Whatever the official exchange rate at a changeover, the new currency would quickly find a market level against the euro and other currencies.

不管官方的汇率是多少，新货币应该迅速做好与欧元和其他货币相区分的市场价格定位。

youdao

This, however, may push others towards the black market or offshore, further undermining the credibility of the official exchange rate.

然而这会使其它人走向黑市或海外市场，这样就会更加削弱官方汇率的可信度。

youdao

It also managed to narrow the gap between the official exchange rate and the price of the dollar in the free market.

它也设法缩小官方汇率与自由市场的美元价格之间的差距。

youdao

The gap between the official exchange rate and the rate in the swap market has widened to nearly 20%.

ECONOMIST: Rootling around for cash

Now, dollars sell on the black market at three times the official exchange rate and Maduro has had to devalue Venezuela's currency, the bolivar, twice this year.

NPR: Tensions Up In Venezuela After Polls Close

This action targets those people that have been using credit cards as a way to purchase at the official rate rather than the black market rate, in effect creating a dual credit card exchange regime.

FORBES: Argentina Begins Tracking All Credit Cards