exchange competition

例句：

1. 1. They exchanged ideas with each other during the meeting.
   他们在会议期间互相交换了意见。
2. 2. The company exchanges its products with other companies for goods and services.
   该公司与其他公司进行产品交换，以换取商品和服务。
3. 3. Exchange rates fluctuate frequently due to economic conditions.
   由于经济状况的变化，汇率经常波动。