exchange contract note

例句：

1. 1. They exchanged theirold clothes for new ones at the market.
   他们在市场用旧衣服换了新衣服。
2. 2.The company exchanges its shares with othercompanies to raise capital.
   该公司与其他公司交换股份以筹集资金。
3. 3. Exchange rates fluctuate frequently due to fluctuations inglobal markets.
   由于全球市场的波动，汇率经常变动。