名词
中文翻译：投诉者
同义词：
['complainer', 'complainer', 'litigant例句：1. The police are investigating the complaint against the restaurant.（警方正在调查对这家餐厅的投诉。）2. He was a complainant in the case of the missing child.（他是失踪儿童案件的投诉人。）']
例句：
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1. The police are investigating the complaint against the restaurant.
警方正在调查对这家餐厅的投诉。
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2. He was a complainant in the case of the missing child.
他是失踪儿童案件的投诉人。
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3.She is a complainant who has filed a lawsuit against the company.
她是对公司提起诉讼的投诉人。