coupons
A coupon is a piece of printed paper which allows you to pay less money than usual for a product, or to get it free.
a money-saving coupon.
一张省钱的优惠券。
A coupon is a small form, for example, in a newspaper or magazine, which you send off to ask for information, to order something, or to enter a competition.
Mail this coupon with your cheque or postal order.
把这张表单和你的支票或汇票一起邮寄。