paper money是可数名词吗

Gold was heavy and cumbersome compared with paper money.

因为黄金和纸质货币比起来又笨又重。

Paper money is an ancient technology and an inconvenient means of payment.

纸钞是一种古老的技术，也是一种麻烦的'的支付手段。

Some Banks, however, did not have enough gold to support all the paper money they offered.

然而，一些银行没有足够的黄金储备来支持他们所发行的货币。