reducing or exempting customs duty

例句：

1. 1. The cost of thenew product is reducing daily.
   新产品的成本每天都在降低。
2. 2. The company's profits are decreasingdue to competition.
   由于竞争，公司的盈利正在减少。
3. 3. Theamount of sugar in the drinkis reducing as it sits.
   饮料中的糖分随着时间推移正在减少。
4. 1.The student was exempt from attending themeeting.
   学生被免除参加会议。
5. 2. The governmenthas been exempt from paying taxes forseveral years.
   政府已经免除了几年的税收。
6. 3. The teacher exempted the studentsfrom homework.
   老师免除了学生的作业。