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	to-ovo vegetarian to-side to-veg to-year to/by all (outward) appearances to/till/until the end of time to/until the bitter end toa Toa Alta Toa Baja toad toad bug toad crab toad lily toad rush toad snatcher toad sorrel toad spit toad spittle toad spot toad's sorrel toad's-cheese toad's-cheeses toad's-eye toad's-eye tin

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