1. 示范者：传统的教学,教师的作用也只是充当一名讲师(lecturer),而新教材要求教师集各种角色于一身;在复习时是记忆激活者(acticator),在呈现新内容时是示范者(demonstrator)的操练时是组织者或指挥者(organizer or conductor),

2. 示教器：demonstration 论证,示教 | demonstrator 示教器 | demu osation 粘膜剥离术

3. 示范者,演示者：demonstration 示范,演示 | demonstrator 示范者,演示者 | diphthong 双元音

4. 示威者：demonstration 示威 | demonstrator 示威者 | deployment 军队部署

1. 示威者;示威游行（或集会）者
    Demonstrators are people who are marching or gathering somewhere to show their opposition to something or their support for something.

    e.g. I saw the police using tear gas to try and break up a crowd of demonstrators.
           我看见警察正试图用催泪弹驱散一群示威者。

2. 示范者;演示者
    A demonstrator is a person who shows people how something works or how to do something.

3. 样品;试用品
    A demonstrator is an item for sale that customers can use and test so they can decide whether they want to buy it.

demonstrator

    e.g. Saab dealers are currently giving away unaccompanied 24-hour test drives in posh demonstrator models.
           萨博汽车的经销商目前正推出高档样品车无人陪同的 24 小时试驾活动。

1. someone who participates in a public display of group feeling

    Synonym: protester

2. someone who demonstrates an article to a prospective buyer

    Synonym: sales demonstrator

3. a teacher or teacher''s assistant who demonstrates the principles that are being taught