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protactinium

US [ˌprəʊtæk'tɪniəm]
UK [ˌprəʊtæk'tɪniəm]
  • n.镤(放射性化学元素)
  • Web镨;钋;元素镁
protactinium
n.
1.
镤(放射性化学元素)a chemical element. Protactinium is a radioactive metal found naturally when uranium decays.