打折英语on

1.give a discount （discount作名词意为折扣）例句: Do you give a discount for a largo order？ 2.discounting （动词discount的现在分词形式；也作名词）例句: Can you give me a discount?3.on sale (廉价出售，也可意为打折)例句: Is this shampoo on sale today? 如果要表示打几折:九折： with 10% 7.5折: with 25%例句：A discount will be given for a big order, so we are willing to give you a 5% discount.如有疑问，欢迎提出！

15% discount英语国家85折是减少15%中国的商家表达都是错误的。

be on sale