demonstrator [ˈdɛmənˌstretɚ]

例句:

• 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。
  
• For one demonstrator this stance causes disbelief and fear.
  来自VOA
• 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。
  
• " 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. ”
  
• Demonstrator Munther Yehya says the existing system benefits politicians.
  来自VOA
• "We are Egyptian," said the demonstrator.
  来自VOA