来自《耶鲁大学开放课程：金融市场 第16集 第16集》
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if you could go back in a time machine如果你可以乘坐时光机 -
to before 1860 in the United States,回到1860年以前的美国 -
you would have real problems with paper money你将会面对严重的纸币问题 -
and you would be very much aware of the paper money.那时你会更加在意你的纸币 -
If you took out your wallet如果你掏出钱包 -
and looked at the paper money in your wallet,看着钱包里的纸币 -
it would be issued by lots of different banks,它们由许多家不同的银行发行 -
not any one standard bank.而不是源自一家标准银行 -
If you went to a store to buy something with paper money,如果你用纸币在商店里买东西 -
then the person at the--would it be a cash register?商店的人有...是叫收银机吗 -
What did they have?他们放钱的叫什么 -
Cash box would be--现金柜边上的人