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  1. pons asinorum

    • IPA[ˌpɒnz ˌasɪˈnɔːrəm]

    英式

    • n.
      the point at which many learners fail, especially a theory or formula that is difficult to grasp.
    • noun: pons asinorum

    • 更多解釋
    • IPA[ˌpänz ˌasəˈnôrəm]

    美式

    • n.
      the point at which many learners fail, especially a theory or formula that is difficult to grasp.

    Oxford American Dictionary