n.游行示威者，证明者，示范者，实物说明者...

" 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. ”Saab dealers are currently giving away unaccompanied 24-hour ...

demonstrator的复数形式为：demonstrators...

demonstrator的音标：demonstrator的英式发音音标为：['demənstreɪtə(r)]demonstrator的美式发音音标为：['dɛmənˌstretɚ]...

" 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. ”The demonstrator should indicate the degree of this reliabili...