It sells for about 20 cents a pound, so that represents about one-third of a trillion dollars.

它的价格为20美分每磅，这价值,大约为3000多亿美元。

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What is the present value of that? Well, the first-- each payment we'll call a coupon-- so it pays one pound one year from now.

那么它的现值又是多少呢,首先,每一次支付的数额称为一个券息,从现在开始每一年都要支付一英镑

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