efficient trade requires that money is available as a medium of exchange什么意思,急

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efficient trade requires that money is available as a medium of exchange什么意思,急

efficient trade requires that money is available as a medium of exchange什么意思,急
efficient trade requires that money is available as a medium of exchange什么意思,急

efficient trade requires that money is available as a medium of exchange什么意思,急
有效的贸易需要可用的货币作为交换的媒介

交易效率的需求,使钱成为一种交换的媒介