英语阅读时如何选择原版书 在一些好老师的大力宣传下，这几年风向终于转向读原版书了。然而，选择原版书的时候，有人误打误撞确实走上了正确的道路，仍然...

before money was used people simply00:02bartered person one gave person ...

let's assume you live in a small town00:02where nobody sells bananas00:0...

00:00banks are allowed to create money00:02through a system called fract...

yes money can indeed become worthless00:03Zimbabwe is the most popular r...

:00when the prices of goods and services go00:02down00:03we have deflati...

let's assume your monthly income were to00:02somehow double congratulati...