currency unfit for circulation

例句：

1. 1. The currency exchangerate is the price at which one currency can be exchanged for another.
   货币兑换率是某种货币可以兑换成另一种货币的价格。
2. 2. The government's decision to devalue the currency has had a significant impact on the economy.
   政府决定贬值货币对经济产生了重大影响。
3. 3. The currency market is highly volatile and can be influenced by global events.
   货币市场高度波动，并受全球事件的影响。