customs user fee

例句：

1. 1. The customs user fee is a significant expense for importers and exporters.
   海关用户费用是进口商和出口商的一大开销。
2. 2. The company has decided to increase the customs user fee to protect its profits.
   该公司决定提高海关用户费用以保护其利润。
3. 3. The customs user fee is calculated based on the value of goods entering or leaving the country.
   海关用户费用是根据进入或离开国家的商品价值来计算的。