n.示威者；示范者
A surge of demonstrators broke through the fence. 汹涌而来的示威者冲破了围栏。
The police estimated the number of demonstrators at about 2000. 警察当局估计游行的人数为2000人。
The demonstrator should indicate the degree of this reliability. 验证者应该指出这种可靠的程度。
