prepaid coupon system

例句：

1. 1.The prepaid coupon system is a popular way for customers to save money on purchases.
   预付优惠券系统是顾客节省购物费用的流行方式。
2. 2.This prepaid coupon system allows customers to receive discounts on their purchases without having to pay upfront.
   这个预付优惠券系统允许顾客在购买时获得折扣，而无需预先支付。
3. 3. The prepaid coupon system has become increasingly popular in recent years, as more and more people are looking for ways to save money.
   近年来，预付优惠券系统越来越受欢迎，因为越来越多的人正在寻找省钱的方法。