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barium sulphate

资料来源 : WordNet®

barium sulphate
     n 1: a white insoluble radiopaque powder used as a pigment [syn:
          {barium sulfate}, {blanc fixe}]
     2: a white or colorless mineral (BaSO4); the main source of
        barium [syn: {heavy spar}, {barite}, {barytes}]
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