/'demənstreɪtə(r); `dɛmən,stretɚ/
n
1 person who teaches or explains by demonstrating (demonstrate 2) 示范助教
*The demonstrators set up apparatus for the experiment. 示范助教安排好了实验装置.
2 person who demonstrates (demonstrate 3) 示威者; 游行者; 集会者
*The noisy demonstrators were dispersed by the police. 喧嚷的示威者遭警察驱散.

n[C]
someone who takes part in a demonstration
　anti-war demonstrators
someone who shows people how to do something or how something works