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  1. undetectable

    • IPA[ˌəndəˈtektəb(ə)l]

    美式

    • adj.
      not able to be detected.
    • 更多解釋
    • IPA[ˌʌndɪˈtɛktəbl]

    英式

    • adj.
      not able to be detected: in the other two patients the antibodies were undetectable after one year a virtually undetectable particle

    Oxford Dictionary