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
- Exhibiting or caused by radioactivity.
显示出放射能或者由放射能导致的。 - 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。 - There is concern about the amount of radioactivity being released into the environment.
人们对释放进环境的辐射量表示不安。 - The decrease in percentage difference of radioactivity over these two sites indicates the rate of thrombus dissolution.
两部位放射活性百分比差异的减少提示了血栓的分解率。 - Here, therefore, we have a true radioactivity which is made evident by the emission of positive electrons.
我们因此获得了一种通过排斥正电子表现出来的真正的放射现象。 - Radioactivity is a special quality of radium.
放射性是镭的一种特性。 - Instead they found little more than background levels of radioactivity.
然而，他们只发现了和背景放射性差不多的放射性水平。 - 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。 - 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。 - 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。