Sources of this include the medical use of radioactive materials, fallout and contamination from nuclear industry, and the storage and dumping of radioactive waste.
辐射源包括医用放射性材料、核工业的放射性沉降物和污染物，以及辐射废弃物的积存和倾倒。
Sources of this include the medical use of radioactive materials, fallout and contamination from nuclear industry, and the storage and dumping of radioactive waste.
辐射源包括医用放射性材料、核工业的放射性沉降物和污染物，以及辐射废弃物的积存和倾倒。
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