quantity theory of the purchasing power of money

例句：

1. 1.The quantity theory of the purchasing power of money has been a subject of much debate in economics.
   货币购买力数量理论一直是经济学中争论的焦点。
2. 2. This study aims to explore the quantitative relationship between income and consumption in the purchasing power of money.
   这项研究旨在探索收入与消费在货币购买力中的量化关系。
3. 3. The quantity theory of the purchasing power of money is often used to explain fluctuations in consumer spending during economic downturns.
   货币购买力数量理论常被用来解释经济衰退期间消费者支出的波动。