The uranium or plutonium isotopes are referred to as "fissile," which means we can use them to induce fission by bombarding them with free neutrons.

铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。

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"The uranium or plutonium isotopes are referred to as" fissile, "which means we can use them to induce fission by bombarding them with free neutrons."

铀或钚的同位素被称为裂变材料，即我们可以利用自由中子去轰击它们来产生裂变反应。

youdao

Results SOD significantly reduced the rapid decrease of the cell viability and DNA chain fragmentation when treated with enriched uranium and markedly enhanced the free spermidine of PC12 cell. Concl…

结果SOD可抑制浓缩铀诱发细胞活性迅速下降及DNA链断裂，同时提高细胞内游离精脒含量。

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The change is being caused by the expiration of the HEU-LEU contract, signed in 1993 by Russia and the US. The treaty, which expires in 2013, allowed the duty-free export of Soviet uranium extracted from nuclear warheads.

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