uranium-235
(physics) A fissile isotope of uranium, used for energy generation and in atomic weapons, containing one hundred and forty-three neutrons. It has a half-life of 7·038×10⁸ years; it decays into thorium-231 and ultimately lead.
(intransitive) To set a booby-trap. / (transitive) To install a booby-trap in or on (a harmless object).
present participle of zizz
plural of genepool
研究者たちは原子炉の安全性モデルを改善するため、質量数235のウラン（核分裂性同位体）の中性子吸収断面積を分析した。
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