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。 - 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。 - ( combining form) indicating radiation or radioactivity.
（化和形式）指示放射或放射能的。 - Radioactivity is the energy given off by rays from a few unstable elements such as uranium and thorium.
放射性是某些不稳定元素如铀和钍的射线放射出来的能量。 - 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。 - This example illustrates the great sensitivity of the radioactivity method.
这个例子说明了放射性方法很灵敏。 - 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。 - The ability of radiation to induce radioactivity in food is related to its energy.
辐照所引起的使食物具有放射性的能力是与辐照的能量有关的。 - 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。 - Radioactivity is a special quality of radium.
放射性是镭的一种特性。