名词
中文翻译：未识别的来源
同义词：
['unidentified', 'unverified']
例句：
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1. The government has not identified the source of the leaked information.
政府尚未确定泄露信息的来源。
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2. The scientist was unable to identify the source of the disease.
科学家无法确定这种疾病的来源。
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3. The investigation into the source of the contaminated water is ongoing.
对受污染水源来源的调查正在进行中。