Instead of setting up a central bank in the United States as was done commonly in other countries the United States instead created twelve banks; they're the twelve Federal Reserve Banks.

与在很多国家设立中央银行,不同的是,在美国,建立了十二个银行；,它们是十二个联邦储备金银行。

耶鲁公开课 - 金融市场课程节选