vt.对…表示怀疑，置疑

原形：impugn第三人称单数：impugns过去式：impugned过去分词：impugned现在分词：impugning

He impugned the honesty of his opponent in the debate.
他质疑了辩论对手的诚实。
The defendant impugned the credibility of the witness's testimony.
被告质疑证人证词的可信度。
His accusations impugned her character, leaving her feeling defamed.
他的指控损害了她的名誉。
The lawyer's argument impugned the motives of the police officer involved in the case.
律师的论点质疑了警察在案件中的动机。
The witness's impugning of the alibi put the suspect under intense scrutiny.
证人对嫌疑人不在场证明的质疑使他受到了严密的审查。
The politician's scandalous remarks impugned the integrity of the entire political system.
这位政治家的不当言论质疑了整个政治体系的公正性。
The journalist's investigation impugned the authenticity of several high-profile news stories.
记者的调查质疑了几起知名新闻事件的真实性。
The historian's research impugned the widely accepted historical narrative.
历史学家的研究质疑了广为接受的历史叙述。
The judge's ruling impugned the legality of the government's actions.
法官的裁决质疑了政府行为的合法性。
The scientist's findings impugned the prevailing scientific consensus on climate change.
科学家的发现质疑了关于气候变化的主流科学共识。