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  1. Oxford American Dictionary

    specific activity

    • IPA[spəˈsifik akˈtivədē]
    • n.
      the activity of a given radioisotope per unit mass.

    • noun: specific activity, plural noun: specific activities

    • 更多解釋

    specific activity

    • n.
      the activity of a given radioisotope per unit mass.

    Oxford Dictionary