A medium of exchange is an intermediary instrument or system used to facilitate the sale, purchase, or trade of goods between parties. Using a medium of exchange allows for greater efficiency in an economy and stimulates an increase in overall trading activity.
交换媒介是一种中介工具或系统，用于促进各方之间的商品销售、购买或贸易。使用交换媒介可以提高经济效率并刺激整体交易活动的增加。