The firemen were in a puzzle about the cause of the fire.

消防队员对这场火灾的起因困惑不解.

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He was in a puzzle about what to do next.

下一步做什么,他感到困惑不解.

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We were all in a puzzle about his latest disappearance.

我们都对他最近的失踪困惑不解.

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During those days, I was in a puzzle about the meaning of life.

那些日子, 我是在益智关于生命的意义.

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