gold dollar bill的意思|示意

He talked about the gold standard that America was on, and that each dollar bill was actually a silver certificate.

他说到美国正处于金本位制，每一张美钞实际就是一枚金属货币。

The principle advanced is simple: the same dollar bill, used twice, is as effective as two individual dollar bills; the same amount of gold reserve has done twice the work.

其实原理非常简单：同样一张一美元钞票，使用两次之后，便具有相当于两张一美元的效力；相同数量的黄金储备发挥了两倍的作用。