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单词	mesothorium
释义	mesothorium noun meso·​thorium ¦me|zō, ¦mē|, |sō+ : either of two radioactive products intermediate between thorium and radiothorium in the thorium series or a mixture of the two products obtained usually from thorium minerals (as monazite sand) and used as a substitute for radium especially in luminous paints: a : an isotope of radium called also mesothorium 1 —symbol MsTh1 or Ra228 b : an isotope of actinium called also mesothorium 2 —symbol MsTh2 or Ac228 Word History Etymology New Latin, from mes- + thorium
随便看	come to one's senses come to oneself come to pass come to pieces come to public notice come to rest come to someone's assistance come to someone's attention come to someone's defense come to someone's mind come to terms come to the conclusion come to the point come to the realization come to the rescue of come to think of it come to trial come to/into someone's mind come together come true come under come under attack come under fire come unglued come unstuck

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