货币 money,currency外汇 foreign exchange,exchange铸币 coin银行券 banknote纸币 paper money,paper currency存款货币 deposit money购买力 purchasing power购买力平价 purchasing power parity(PPP)价值尺度 measure of values货币单位 money unit, currency unit流通手段 measure of circulation购买手段 measure of purchase交易媒介 media of exchange支付手段 measure of payment货币需求 demand of money汇率 exchange rate一般等价物 universal equivalent流动性 liquidity准货币 quasi money货币制度 monetary system金本位 gold standard