They began to use paper money for coins.
他们开始用纸币兑换硬币。
The cost of producing money was reduced from the founding of metal COINS to the printing of paper notes. England created its own cheap money.
货币的生产成本由铸造金属货币的昂贵费用降为印制纸质票据的低廉费用，英国创造了自己的廉价货币。
Cash is really a common term including everything - currency, COINS, paper money.
现金是对流通货币，硬币，钞票的共同叫法。
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