不可数,例如:
1.Being paper money, it rotted away mighty fast.由于是纸币,所以烂得很快。
2.Paper money also took him by surprise, since it was not yet in use in the West at that time.纸币也让他大吃一惊,因为当时西方还没有使用纸币。
3.Shoppers in the UK are spending less money on toilet paper to save money, research has shown.研究发现,英国的消费者们为了省钱在厕纸上的花费日趋减少。