medium of exchange造句

1、Money as the actual medium of exchange is completely liquid
货币作为实际的交换媒介完全是可变的

2、One of the reasons for selecting gold as the medium of exchange is that it is relatively scarce.
选择黄金作为交换媒介的原因之一是黄金的相对稀缺性。

3、the metal or paper medium of exchange that is presently used.
现行的金属货币或纸币。