名词
中文翻译：无能的证人
同义词：
['unqualified witness', 'inadequate witness']
例句：
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1.The police officer was accused of being an incompetent witness during the trial.
在审判期间，这位警察被控为无能的证人。
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2.She insisted that she was an incompetent witness and did not want to testify.
她坚称自己是无能的证人，不想作证。
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3. The court found that the incompetent witness's testimony had been misleading.
法院发现那位无能证人的证词有误导性。