informant

/ɪnˈfɔɹmənt/ 名词 C2

中文：提供消息的人、告密者、线人、举报人

One who relays confidential information to someone, especially to the police; an informer.
A native speaker who acts as a linguistic reference for a language being studied. The informant demonstrates native pronunciation, provides grammaticality judgments regarding linguistic well-formedness, and may also explain cultural references and other important contextual information.

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来自图书馆

We started off for the cab together, leaving our informant incredulous, but obviously uncomfortable.

I only repeat what I have been told, and like my informant I can do no more.

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