词典释义：
a deduction from the usual cost of something, typically given to customers who pay cash or in advance
（多指给予付现金或预付的顾客的）折扣
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rail commuters get a discount on season tickets
乘火车上下班的旅客买季票都打折
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[mass noun]
we want to introduce a standard level of discount for everyone .我们想对所有人采用统一的折扣标准。
【财政】 （汇票或期票到期前转手的）贴现率。
deduct an amount from (the usual price of something)
打折扣
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a product may carry a price which cannot easily be discounted .有的产品的价格可能是不轻易打折的。
reduce (a product or service) in price
降低（产品或服务的）价格
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one shop has discounted children's trainers 一家商店把儿童跑鞋的价格降了下来
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[as adj.
discounted ]discounted books .降价书。
buy or sell (a bill of exchange) before its due date at less than its maturity value
贴现。
regard (a possibility, fact, or person) as being unworthy of consideration because it lacks credibility
对（可能性，事实，人）不全信，对…不予考虑
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I'd heard rumours ,but discounted them .我听到了谣言，但半信半疑。
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at a discount below the nominal or usual price 打折的a scheme which lets tenants buy their homes at a discount ． 可以让租户以折扣价买房的计划 -
比较
at a premium （见PREMIUM ）．
"early 17th cent． （denoting a reduction in the amount or value of something）： from obsolete French
