exchange speculation

例句：

1. 1. They exchanged their opinions on the matter.
   他们在这个问题上交换了意见。
2. 2.The company exchanges its products with other companies for new ones.
   该公司与其他公司交换产品以获取新产品。
3. 3.Exchange rates fluctuate frequently due to fluctuations in currency markets.
   由于货币市场的波动，汇率经常变动。