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  1. pen pal

    英式

    • n.
      a penfriend.
    • noun: pen pal, plural noun: pen pals

    • 更多解釋
    • IPA[ˈpen ˌpal]

    美式

    • n.
      a person with whom one becomes friendly by exchanging letters, especially someone in a foreign ...

    Oxford American Dictionary

  2. 知識+