exchange of information rules

例句：

1. 1. They exchanged pleasantries with each other.
   他们彼此问候。
2. 2. The company exchanged its shares for new ones.
   该公司用新的股票交换了旧的股票。
3. 3. Exchange rates are constantly fluctuating due to global economic conditions.
   由于全球经济状况，汇率不断波动。