形容词
中文翻译：Unknown
同义词：
['unnecessary', 'extra', 'foreign']
例句：
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1. The extraneous noise from the construction site was distracting.
工地的额外噪音分散了注意力。
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2. He decided to take an extraneous trip to explore the city.
他决定去一次额外的旅行来探索这个城市。
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3. The extraneous information was not relevant to the main topic.
额外的信息与主题无关。