免税代码

例句：

1. 1. The company uses a tax-free code to avoid paying taxes on its profits.
   该公司使用一个免税代码来避免对其利润征税。
2. 2. The government issued a new tax-exempt code for the renewable energy sector.
   政府为可再生能源领域发布了一个新的免税代码。
3. 3. The tax-free code is only valid for purchases made within the specified period.
   这个免税代码只适用于指定期限内购买的商品。