Well what it means is that starting in the 1930s we began to think of central banks as managing the money stock to stabilize the economy.

好吧，它意味着从二十世纪三十年代开始,我们就认为中央银行是,为了稳定经济而,管理金融债券的。

耶鲁公开课 - 金融市场课程节选

This number, CUSIP number, is a number that identifies any security.

USIP代码是所有美国股票及注册债券的编号由美国统一证券辨认委员会管理,用于区别每一项证券

耶鲁公开课 - 金融市场课程节选