It pays for Brazilian coffee with dollars,which Brazil can then use to buy wool from Australia,which in turn can buy textiles from Great Britain,which can then buy tobacco from the United States.

• 用美元付款给巴西的咖啡豆，巴西可以利用这笔钱购买澳大利亚的羊毛，澳大利亚再利用这笔钱从英国购买纺织品，然后英国再用这笔钱从美国买烟草。