| 1. | The fission products formed are highly radioactive .
所生成的裂变产物具有很强的放射性。
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| 2. | The transmittance is central to the theory of radioactive cooling .
透过率是辐射冷却理论的中心。
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| 3. | When the organism dies, no new radioactive carbon is assimilated .
机体死后，不能再吸取新的放射性碳。
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| 4. | The breakdown of radioactive isotopes goes on at constant rates .
放射性同位素的衰变在恒定的速率下进行。
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| 5. | The radioactive dust will contribute to higher levels of uranium and radon .
放射性尘埃会形成铀和氡的高值。
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| 6. | The residual nucleus will, in general, undergo a radioactive transformation .
剩余核一般说来将发生一次放射性衰变。
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| 7. | During those hours radioactive xenon gas built up in the reactor .
在这几个小时中，放射性气体氙在反应堆中聚集增多。
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| 8. | Pitchblende and chalcolite are much more radioactive than uranium itself .
沥清铀矿和铜铀云母比纯铀的放射性强得多。
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| 9. | One study suggested the cause might be radioactive fall-out from atom bombs .
一项研究认为起因可能是核炸弹的辐射尘。
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| 10. | Because of this radiation they said the substance was radioactive .
由于这种辐射性现象，他们把该种物质称为放射性物质。
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