| 单词 | 同位素 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔D〕The symbol for the isotope deuterium.氘的化学符号：同位素氘的符号美国传统〔IW〕Isotopic weight.同位素量美国传统〔T〕The symbol for the isotope tritium.同位素氚的符号美国传统〔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〔enrich〕Physics To increase the amount of one or more radioactive isotopes in (a material, especially a nuclear fuel).【物理学】 添加元素：增加一种同位素或更具有放射性的核素的数量于（一种物质，尤其是核燃料）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〔heavy〕Physics Of or relating to an isotope with an atomic mass greater than the average mass of that element.【物理学】 重的：原子质量比该元素的平均原子质量重的同位素的或与之有关的美国传统〔hydrogen bomb〕An explosive weapon of enormous destructive power caused by the fusion of the nuclei of various hydrogen isotopes in the formation of helium nuclei.氢弹：一种爆炸性武器，具有极大的破坏力，这种破坏力由不同的氢同位素原子核构成氦原子核时所产生的核聚变引起美国传统〔isotope〕One of two or more atoms having the same atomic number but different mass numbers.同位素：两个或更多具有相同原子序数却具有不同的质量数的原子中的一个美国传统〔radioecology〕The study of the effects of radiation and radioisotopes on an ecological population or community.放射性生态学：对放射性和放射性同位素对生态群落的影响的研究美国传统〔radioiodine〕A radioactive isotope of iodine widely used as a tracer in medical diagnosis.放射性碘：碘的一种放射性同位素，广泛地用于医学诊断作为追踪剂美国传统〔radioisotope〕A naturally or artificially produced radioactive isotope of an element.放射性同位素：天然存在或人工合成的某种元素的有放射性的同位素美国传统〔radiolabel〕A radioactive isotope used as a tracer; a radiotracer.用作追踪剂的放射性同位素；放射性追踪剂美国传统〔radiolabel〕To tag (a hormone, an enzyme, or other substance) with a radioactive tracer.放射性同位素追踪剂：同放射性追踪剂（荷尔蒙、酶或其它物质）美国传统〔radiotherapy〕Treatment of disease with radiation, especially by selective irradiation with x-rays or other ionizing radiation and by ingestion of radioisotopes.放射疗法：用放射进行的疾病治疗，尤指用X射线或其它电离辐射的有选择放射和吞下放射性同位素美国传统The most stable isotope of plutonium has a half-life of almost 25000 years.钚最稳定的同位素的半衰期为25000年。剑桥国际 |
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