demonstrator
英 ['dem?nstre?t?]
美['d?m?n'stret?]
- n. 示威者；論證者；指示者；證明者
英英釋意
- 1. a teacher or teacher's assistant who demonstrates the principles that are being taught
- 2. someone who demonstrates an article to a prospective buyer
- 3. someone who participates in a public display of group feeling