问题如下：
The exchange rate between USD and some foreign currencies is quoted by traders with USD as the quote currency. Give three foreign currencies for which this is the case.
解释：
Possible answers are GBP, AUD, NZD, and EUR. The exchange rate for these currencies is quoted by traders as the number of units of USD per unit of the foreign currency.
没看懂题目和答案～可以解释一下吗