a person who takes part in a public protest meeting or march
集会示威者,游行示威者。
a person who shows how a particular piece of equipment works or how a skill or craft is performed
演示者。
a person who teaches in this way, especially in a laboratory
演示教师,演示教学者。
a piece of merchandise which can be tested by potential buyers
样品;可试用样品。
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demonstratorn.集会示威者;游行示威者;演示者;演示教师;演示教学者;样品;可试用样品
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demonstrationn.证明;证实;示威集会;示威游行;示范;演示;感情流露
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demonstratev.证明;证实;参加游行;演示;显示;表露;表现
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