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radioactivity

美国发音:[.reɪdioʊæk'tɪvəti]
英国发音:[.reɪdiəʊæk'tɪvəti]

[n]
英语解释:the radioactive nature of a substance such as uranium or plutonium
常见翻译:〔物〕辐射,放射性,放射作用