名词
中文翻译：优惠券
同义词：
['discount', 'voucher']
例句：
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1.She used her coupon to get a discount on the movie ticket.
她用优惠券在电影票上打折。
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2.The store offered a 20% off coupon for all customers.
商店对所有顾客提供20%的折扣优惠券。
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3.I found a coupon in the back of my wallet and used it to save money on groceries.
我在钱包后面找到了一张优惠券，用它来节省杂货钱。