形容词
中文翻译：未知的
同义词：
['unidentified', 'unrecognized', 'unknown']
例句：
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1. The location of the lost treasure is still unknown.
失窃的宝藏的位置仍然未知。
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2. The scientist has yet to identify the source of the disease.
科学家还未确定这种病的原因。
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3. The identity of the suspect was never known to the police.
嫌疑人的身份从未被警方知晓。