形容词
中文翻译：Unknown
同义词：
['blind', 'inexplicably', 'uncertainly']
例句：
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1. He was so lost in thought that he couldn't answer the question.
他陷入了沉思，以至于无法回答那个问题。
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2. She was completely unaware of the dangers she was facing.
她完全不知道自己面临的危险。
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3. The situation was so confusing that they were all at a loss for words.
情况太混乱了，他们都不知道该说什么好。