名词
中文翻译：Unknown
同义词：
['guardian', 'protector', 'volunteer']
例句：
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1. The vigilantes patrolled the streets after the riot.
暴动后，义勇队在街上巡逻。
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2. He was a volunteer who helped those in need.
他是个自愿者，帮助有需要的人。
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3. The vigilantes were determined to catch the criminals.
义勇者们决心抓住罪犯。