Background and terminology 4.rate of exchange also called exchange rate;in relation to foreign exchange of money,the price of a country's currency expressed in terms of one unit of another country's currency 汇率 制价爱行蜀易大考 15Background and terminology Background and terminology 4.rate of exchange 4.rate of exchange also called exchange rate; in also called exchange rate; in relation to foreign exchange of relation to foreign exchange of money, the price of a country's money, the price of a country's currency expressed in terms of one currency expressed in terms of one unit of another country's currency unit of another country's currency 汇率