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
- 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。 - We have to learn to control radioactivity.
我们必须学会控制放射能。 - 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。 - Detects the presence of radio signals or radioactivity.
探测无线电信号或放射能的存在。 - This paper presents basic situation and survey methods of environmental radioactivity in Mongolia and Romania.
本文介绍了蒙古和罗马尼亚两国环境放射性的基本态势，以及环境放射性调查方法等。 - 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。 - Cancer is no longer an incurable disease nowadays, it can be remedied by using radioactivity.
如今癌症不再是不治之症了，它可以通过放射治疗。 - 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。 - 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。 - 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。