优待券

例句：

1. 1. This store offers aspecial discount on its loyalty card.
   这家商店对其忠诚度卡提供特别折扣。
2. 2. The student received an extra discount forbringing his own lunch.
   学生因自带午餐而获得了额外的折扣。
3. 3. The discount coupon wasvalid only for the first 30minutes of the event.
   该优惠券仅在活动开始前30分钟内有效。