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radioactivity

/reɪdioʊæktɪvəti/

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1 · noun

the release of radiation from unstable material

放射性

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Scientists measured radioactivity in the soil near the old plant.
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科学家测量了旧工厂附近土壤的放射性。
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Pronunciation: /reɪdioʊæktɪvəti/

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