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单词
radioactivity
释义
radioactivity
/ˌreidiəʊækˈtiviti/
n.
1
the spontaneous disintegration of atomic nuclei, with the emission of usu. penetrating radiation or particles
放射现象
2
radioactive substances, or the radiation they emit
放射性物质;放射线;辐射线
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更新时间:2026/5/24 22:57:31