补充1：汇率的解释

Foreign Exchange Rate (汇率)

斜线左边为单位货币或基准货币；斜线右边为计价货币或标价货币。/为分隔符。

The exchange rate is the price of one currency in terms of another.（汇率是用一种货币表现另一种货币的价格。）A currency exchange rate is aways quoted for a currency pair using ISO(International Standardization of Organization)code abbreviation.( 汇率总是使用国际标准组织的货币配对报价。) For example, EUR/USD refers to the two currencies Euro(the European currency) and U.S. dollar. ( 例如, 欧元/美元是指欧元和美元两种货币.) The first is refered to as the base currency,while the second as the quote currency.(第1种货币是指基准货币、单位货币 ，而第2种货币是指报价货币、计价货币。)The EUR/USD exchange rate specifies how many U.S. dollars you have to pay to buy one Euro, or conversely how many U.S. dollars you obtain when you sel l one Euro. （欧元/美元的汇率确定你（可以是银行或外汇经纪商）买1单位欧元必须支付多少美元，或者相反，当你（可以是银行或外汇经纪商）卖1单位欧元，你能得到多少美元。）More generally, if buying, an exchange rate specifies how much you have to pay to buy in the quote currency to obtain one unit of the base currency, and if