exchange as per endorsement

例句：

1. 1. Theyexchanged their stories about the trip.
   他们交换了关于旅行的故事。
2. 2. Thecompany exchanges its productswith other companies.
   公司与其他公司交换产品。
3. 3. He exchanged his oldwatch for a new one.
   他用自己的旧手表换了一个新表。