知情人
person in the know / insider / informed source
Example Sentences
面对执法人员的询问，知情人主动揭发了违法排污企业的隐蔽暗管。
miàn duì zhí fǎ rén yuán de xún wèn, zhī qíng rén zhǔ dòng jiē fā le wéi fǎ pái wū qǐ yè de yǐn bì àn guǎn.
Faced with inquiries from law enforcement officials, insiders took the initiative to expose the hidden pipes of illegal pollutant discharge companies.
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