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Demonstrator
01
演示者, 讲解员
a person whose job is explaining to a group of people how something works
Example
The demonstrator is showing the audience how to use the new kitchen appliance.
演示者正在向观众展示如何使用新的厨房电器。
The demonstrator, explaining the process step by step, helped everyone understand the procedure clearly.
演示者逐步解释了这个过程，帮助大家清楚地理解了程序。
02
示威者, 抗议者
someone who takes part in a public gathering to protest or to show support
Example
The demonstrators will gather at the capitol next week to advocate for healthcare reform.
示威者将于下周在国会大厦集会，倡导医疗改革。
She joined the demonstrators in the rally to demand equal rights for all workers.
她加入了集会中的示威者，要求所有工人享有平等权利。
03
演示者, 展示者
someone who demonstrates an article to a prospective buyer
