| 单词 | radioactive decay |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔alpha decay〕The radioactive decay of an atomic nucleus by emission of an alpha particle.衰变：放射一个α粒子而导致的原子核的放射性衰变美国传统〔beta decay〕The radioactive decay of an atomic nucleus accompanied by emission of a beta particle.β衰变：伴随β粒子释放的原子核放射性衰变美国传统〔beta particle〕A high-speed electron or positron, especially one emitted in radioactive decay.β粒子：一种高速电子或质子，主要在放射衰变中释放出美国传统〔daughter〕Physics The immediate product of the radioactive decay of an element.【物理学】 继承元素：某种元素放射性衰变的直接产物美国传统〔decay〕Physics Radioactive decay.【物理学】 放射性的蜕变、衰变美国传统〔decay〕Physics To disintegrate or diminish by radioactive decay.【物理学】 衰变：由于放射性衰变而解体或缩小美国传统〔emanation〕Chemistry Any of several radioactive gases that are isotopes of radon and are products of radioactive decay.【化学】 射气：几种氡的同位素的放射性气体，是放射性物质衰变的产物美国传统〔geochronometry〕Measurement of geologic time, as through isotopic radioactive decay.地质年代测定：通过放射性同位素衰变来测定地质年代美国传统〔half-life〕Physics The time required for half the nuclei in a sample of a specific isotopic species to undergo radioactive decay.【物理学】 半衰期：放射性样品的原子核经历一半放射性衰变所需要的时间美国传统〔nuclear reaction〕A reaction, as in fission, fusion, or radioactive decay, that alters the energy, composition, or structure of an atomic nucleus.核反应：发生在核裂变、聚变或放射性衰变等条件下的改变原子核能量、组成或结构的反应美国传统 |
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