exchange half-time

例句：

1. 1. They exchanged information about the new project.
   他们交换了关于新项目的情报。
2. 2. The two countries are currently exchanging ambassadors.
   这两个国家目前正在交换大使。
3. 3. The students exchanged ideas during their debate.
   学生们在辩论中交换了意见。