cost of commodity circulation
商品流通成本
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The paper money invention has enormously facilitated the commodity exchange, reduced the transaction cost, promoted the circulation of commodities, and prevailed in Song and Yuan Dynasty.
纸币的发明极大地方便了商品交换，降低了交易成本，促进了商品 流通，曾在宋元两朝盛极一时。
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