radioactivity
英 [ˌreɪdiəʊæk'tɪvəti]
美 [ˌreɪdioʊæk'tɪvəti]
n. 放射性; 放射(现象)
BNC.16448 / COCA.20084
柯林斯词典
- ADJ-GRADED 放射性的;有辐射的
Something that isradioactivecontains a substance that produces energy in the form of powerful and harmful rays.- The government has been storing radioactive waste at Fernald for 50 years.
政府在弗纳德存放放射性废料已达50年之久。
- The government has been storing radioactive waste at Fernald for 50 years.
英英释义
noun
- the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
双语例句
- Radioactivity provides an extremely sensitive method of analysis since disintegration of individual nuclei are monitored.
因此放射现象可以监视每一个核的裂变，因此放射现象提供了一个极灵敏的分析方法。 - Instruments that can detect minute amounts of radiation for measuring doses of ionizing radiation ( X-rays or radioactivity).
能检测极微量辐射的仪器测量致电离辐射量的仪器。 - Some rare metals have radioactivity.
某些稀有金属具有放射性。 - With radioactivity, if you give me a single atom of uranium, I can tell you it will eventually decay.
就放射性现象来说，你如果给我一个铀原子，我可以告诉你它最终会衰变。 - People had no idea of radioactivity before Curie discovered redium.
直到居里夫人发现镭后，人们才了解放射性。 - Some of that radioactivity could carry in the atmosphere to the west coast of the United States.
某些核辐射可能通过空气传播到美国西海岸。 - Equipment used to treat diseases with x-rays or radioactivity.
利用x光或放射能治疗疾病的装备。 - This conviction was based solely on the atomic nature of radioactivity.
我们的这种信念完全依赖于原子的放射性属性。 - The air survey is specially superior in the regional environmental radioactivity survey, which is recommended by IAEA.
在区域环境放射性测量中，航测具有特殊的优势，是IAEA推荐的手段。 - Radioactivity is the ejection of particles or radiation from the nucleus.
放射性是原子从核中射出粒子或辐射的现象。