n. (c.)可算名詞抗議者The protestors gathered in the town square to voice their concerns.
n. (c.)可算名詞活動家She is a dedicated protestor against environmental pollution.
n. (c.)可算名詞反体制派He was known as a protestor against the government's policies.
n. (c.)可算名詞参加者Every protestor has their own reasons for participating in the demonstration.