This is useful if a rise in interest rates (or a fall in house prices) causes mortgage-backed bonds to trade at a discount.

在利率上升(或者房价下跌)时，住房抵押债券折价销售，这对债券持有人大有裨益。

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However, there is empirical evidence which shows that airline ticket prices typically increase over time while theatre tickets are often sold at a discount on the day.

然而，事实证据表明，机票价格往往是随着时间增加，而戏票总是在上演当日打折出售。

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Carmakers that had to slash prices to get rid of costly inventory at the turn of the year may now be in a position to revert to pre-discount prices as inventory levels stabilize.

汽车制造商在年初被迫降价以清空代价高昂的存货，现在随着库存水平的稳定，他们又可以恢复打折前的价格了。

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The Euro was at an all time high and buying luxury goods at a discount to prices at home was very appealing.

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But falling European demand means falling Brent oil prices, which in turn means cheap Russian-based Urals Mountain oil prices that already trade at a discount to Brent.

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That makes the price-to-earnings ratio look leaner than it is, since buyers at current prices are buying next year's growth at a discount.

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