discusser

例句：

1. 1.The group decided to have a discussion about the new policy.
   这个小组决定就新政策进行讨论。
2. 2. He is a great speaker and often serves as a discusser for important meetings.
   他是一位出色的演讲者，经常担任重要会议的讨论者。
3. 3.She enjoys discussing current events with her friends.
   她喜欢与朋友讨论当前事件。