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  1. Oxford American Dictionary

    out of the blue

    • ph.
      without warning; unexpectedly
    • 相關詞

    out of a (or the) clear blue sky

    • ph.
      as a complete surprise

    Oxford American Dictionary

    a bolt from (or out of) the blue

    • ph.
      a sudden and unexpected event

    Oxford Dictionary

    a bolt from (or out of) the blue

    • ph.
      a sudden and unexpected event or piece of news

    Oxford American Dictionary

    • 更多解釋

    out of the blue

    • ph.
      without warning; unexpectedly

    Oxford Dictionary