单词	secondary radiation
释义	secondary radiation noun : radiation emitted by molecules or atoms after bombardment by a primary radiation Example Sentences Recent Examples on the Web Lunar workers would already by susceptible to harmful cosmic radiation raining down on them, but they would also be exposed to the secondary radiation generated during experiments. Jennifer Leman, Popular Mechanics, 10 June 2020 Word History First Known Use 1900, in the meaning defined above
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