compliments slip

例句：

1. 1. She gave me a compliment slip as a thank you for my help with the project.
   她给了我一张小费卡，作为对我帮助项目的感谢。
2. 2. The waiter slipped him a complimentary drink on his birthday.
   服务员在顾客生日那天给了他一杯免费的饮料。
3. 3.He received a compliment slip from the manager, which he kept as a reminder of his hard work.
   他收到了经理的一张小费卡，他一直保存着，作为对自己辛勤工作的提醒。