mutual preferential duty

例句：

1. 1. The company has agreed to fulfill its mutual preferential duty by providing a discount on the purchase of new equipment.
   该公司同意履行其互惠义务，通过提供购买新设备的折扣。
2. 2. The two countries have reached an agreement on mutual preferential duty, which will benefit bothparties.
   两国就互惠义务达成了协议，这将惠及双方。
3. 3. In international trade, mutual preferential duty is a form of tax that allows importers and exporters toreduce their taxes by exchanging goods or services.
   在国际贸易中，互惠义务是一种税收形式，允许进口商和出口商通过交换商品或服务来减免税款。