单词	radioactinium
释义	radioactinium noun ra·​dio·​actinium "+ : the radioactive isotope of thorium of mass number 227 formed by disintegration of actinium —symbol RdAc or Th227 see actinium series Word History Etymology New Latin, from radio- + actinium
随便看	skillessness skillessnesses skillet skillets skillful skillfuler skillfulest skillfuller skillfullest skillfullier skillfulliest skillfully skillfulness skillfulnesses skillies skilligalee skilligalees skilligillee skilling skillings skillion skillo skills skilly skillyes

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