international custom union

例句：

1. 1. The international custom union has been working on a new agreement for months.
   国际联盟组织已经工作了几个月的新协议。
2. 2. The international custom union is responsible for the regulation of trade in various countries.
   国际联盟组织负责各国贸易的监管。
3. 3. The international custom union has played an important role in promoting economic development.
   国际联盟组织在促进经济发展方面发挥了重要作用。