名词
中文翻译：优惠券
同义词：
['discount', 'voucher', 'coupon code']
例句：
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1.She used her student discount to save money on her purchases.
她用学生折扣在购物时省钱。
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2. The store offers a 10% discount on all its products.
该商店对所有产品提供10%的折扣。
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3.I found a coupon for a free movie ticket at the checkout.
我在结账时找到了一张免费电影票的优惠券。