I’m not sure that I understand the question. (我不確定我是否理解這個問題。)

I’m not sure that I understand the question. (我不確定我是否理解這個問題。)

I’m not sure I understand the question. (我不確定我是否理解這個問題。)

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資訊來源：

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Placeholder 湯偉晉編寫的英文字典

Placeholder 湯偉晉編寫的英文字典

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