informant

• 名词，指提供信息的人，既可以是某一事件的目击者或知情人，也可以是某一主题的知识来源或消息提供者。

A noun referring to a person who provides information, either as a witness to an event or as a source of knowledge on a particular subject.

1. Information providerB2formal

   A person who supplies information, especially in an official or professional context.

   告密者

   • The informant provided crucial details to the investigators.
   • Our research team interviewed several local informants.
   • The informant's testimony helped solve the case.

   同义词contactdeponentinformerreportersourcetipster

2. Witness or reporterB2formal

   Someone who observes an event and reports what happened, often to authorities or media.

   告密者或目击者

   • The informant described the accident in detail to the police.
   • Several informants reported seeing the suspect near the scene.
   • The journalist relied on an anonymous informant for the story.

   同义词correspondentinformernarratorobserverreportersourcetipsterwhistleblowerwitness