exchange discount

例句：

1. 1. They exchanged their ideas with each other.
   他们互相交换了意见。
2. 2. The company exchanged its shares for new ones.
   公司用新的股票交换旧的股票。
3. 3.Exchange rates fluctuate frequently due to global economic conditions.
   由于全球经济状况，汇率经常波动。