demonstrator
🇺🇸
/ˈdemənstreɪtər/
🇬🇧
/ˈdemənstreɪtə(r)/
A person who publicly shows support or protest for a cause.
The soldiers clashed with the demonstrators in the city square.
士兵們在市中心廣場與示威者發生了衝突。
A person who shows how to use a product or perform a task.
The demonstrator showed us how to use the new software.
演示者向我們展示了如何使用新軟體。