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1.The radioactive material was found to be dangerous for human health.
这种放射性物质被发现对人类健康有害。
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2.The research team focused on the study of radioactive isotopes.
研究小组专注于放射性同位素的研究。
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3. The discovery of a new radioactive isotope has sparked excitement in the scientific community.
发现一种新的放射性同位素在科学界引起了兴奋。