1.示威者
2.证明者;示范者;实验示教者;实物说明者
3.用来向顾客作示范表演的产品
1.someone who marches with other people in public to show that they support or oppose something
2.someone whose job is to show people how something works or how to do something
1.He said another demonstrator was arrested because she refused to stop taking photographs of the arrests.
他说，有一名示威者因拒绝停止拍摄捕人画面而被捕。
2.'We'll have a demonstrator of the system working next year, ' he said. 'We hope to at least have it working on prototype aircraft by 2012. '
我们将在明年推出测试验证系统，我们希望它至少能在2012年进行飞机原型机实验。
3.The trial was a test and a demonstrator of one of the applications developed by European researchers at the IPCity project .
测试是为了检验和演示欧洲研究者开发的IPCity项目中的一个应用软件。
4.'This is such good news, ' said one demonstrator, 28-year-old Ken Zhang, who said he began days ago preparing T-shirts and banners.
28岁的示威者张垦（音）说，他从几天前就开始准备T恤和条幅了。
5.The U. S. military's secret space plane, a robotic demonstrator version of a next-generation space shuttle, has been spotted by astronomers.
美国军队的秘密航天飞机，一个下一代太空梭的机器展示版被天文学家发现。
6.The contract also includes an order for a demonstrator programme for Gripen, consisting of one aircraft and a ground-based avionics rig.
这份合同还包括了“鹰狮”飞机的一个验证计划，该计划包括1架飞机和一个地面航电平台。
7.An anti government demonstrator in Bahrain raises a banner that reads "Get out" at the gate of the Saudi embassy in Manama, Bahrain.
巴林麦纳麦沙特阿拉伯大使馆门外，一名反政府示威者在张贴着意为“滚出去”的标语横幅。
8.One demonstrator complained that the Iraqi government was "not doing enough to protect its citizens. "
一名示威者控诉伊拉克政府“没有尽力保护人民”。
9.A demonstrator holds a flare during a protest outside the headquarters of Britain's Conservative Party in London on Wednesday.
周三，伦敦，英国保守党总部外，一名示威者正手举照明弹。
10.Tuesday's hearing was interrupted when a demonstrator sprang up from the crowd and attacked Mr. Murdoch with a plate of foam.
周二的听证会一度中断，因为有人突然蹿出，用一盘剃须膏状的泡沫攻击默多克。