As a generally accepted medium of exchange, money rules out the need for barter, the direct exchange of one item for another.
因为一般人都把金钱当然交易媒介，这就不必再进行物物交换了，即不必再以一种商品去交换另一种商品了。
The use of a single medium is highly advantageous for the same reasons that a money economy is superior to a barter economy: it makes exchanges possible on an incalculably wider scale.
这种对单一交换媒介的使用，就象货币社会之所以比物物交换的原始社会更为进步的原因一样，是相当有利的：因为这使交换可以在不可胜数的大规模情况下得以进行。
A medium of exchange. As a generally accepted medium of exchange, money rules out the need for barter, the direct exchange of one item for another.
作为一个被广泛接受的交换中介，货币消除了以货易货，即一个物品与另一物品直接交换。
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