presenter

例句：

1. 2.
   在会议或活动中
2. 1. The presenter gave a fascinating presentation on climate change.
   演讲者就气候变化做了一次引人入胜的演讲。
3. 2. She is the presenter for our school's annual science fair.
   她是我们学校年度科学展的主持人。
4. 3. The speaker was a renowned expert in his field, and his presentation was highly praised.
   这位演讲者是其领域的知名专家，他的演讲受到了高度评价。