1610s, "one who points out," agent noun in Latin form from demonstrate. From 1680s as "one who uses exhibits as a method of teaching;" 1870 as "one who participates in public demonstrations."
权威例句
1. Marshals tried to wrestle the demonstrator out of the room.
执法人员试图将这名示威者从屋子里拖出去。
2. 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。
3. " There you are — like a knife through butter,'said the demonstrator as the powered shovel swung back with its load.
当动力铲带着铲起的东西转回来时,示范的人说, “ 你瞧是不是,多么容易. ”
4. The demonstrator should indicate the degree of this reliability.
验证者应该指出这种可靠的程度.
5. Caption: A pro - Mousavi demonstrator painted her hand green and wore green accessories.