Then the U.S. is confronted with the possibility that foreigners may sell their bonds or stocks and return the cash from the sale in order to return to their local currency.
那样的话美国会面临这种可能：外国人会为了重新持有他们的本国货币而卖掉债券或股票获得美元现金。
Basically, the Fed lends dollars to foreign central Banks in return for their local currency for a specific period.
这实际上就是，在一段具体的时间段内，美联储向外国央行借出美元，换以当地货币。
It is ideal for conducting international transactions because it is not subject to exchange rates or transactions fees, as it can be bought and sold on an exchange in return for the local currency.
由于比特币可直接换取当地货币并且可在交易所进行出售，且不受汇率影响和交易费用的限制，因此，它非常适合用于国际交易。
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