demonstrators
Demonstrators are people who are marching or gathering somewhere to show their opposition to something or their support for something.
I saw the police using tear gas to try and break up a crowd of demonstrators.
我看到警察正试图用催泪瓦斯驱散示威人群。
A demonstrator is a person who shows people how something works or how to do something.
a demonstrator in a department store.
一名百货商场的产品展示员。