所有经济学学生都学习过蒙代尔-弗莱明模型（Mundell-Fleming model ） ， 该模型指出一个经济是不可能同时具备固定汇率，自由资本流动和独立货币政策。
All economics students learn the Mundell-Fleming model, according to which an economy cannot maintain a fixed exchange rate, free capital movement, and an independent monetary policy simultaneously.