radioactive fall-out
美 [ˌreɪdioʊˈæktɪv fɔːl aʊt]英 [ˌreɪdiəʊˈæktɪv fɔːl aʊt]
- 网络放射性落尘;放射尘
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Radioactive isotope tracing
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radioactive pollution source
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radioactive tracer method
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radioactivity detector
radio-beacon buoy
radiochemy
radioactive damage
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