示范者

例句：

1. 1. The teacher is a demonstrator of the class.
   老师是这节课的示范者。
2. 2. The scientist demonstrated his findings in front of the audience.
   科学家在观众面前演示了他的发现。
3. 3.She was a demonstrator of her art skills at the exhibition.
   她在展览上展示了她的艺术技巧作为示范者。