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
- Detects the presence of radio signals or radioactivity.
探测无线电信号或放射能的存在。 - 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。 - Radioactivity is a special quality of radium.
放射性是镭的一种特性。 - 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。 - The absorption of haematomas was assessed quantitatively by daily measurement of the radioactivity and compared intraindividually.
血肿的吸收通过每日定量地测定放射活性进行比较。 - 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。 - 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。 - 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。 - So the concentration of radioactivity in the seawater would still be quite low.
因此海水中的放射性浓度仍将相当低。 - 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。