radioactivity是什么意思？

radioactivity

英[ˌreɪdɪəʊæk'tɪvətɪ] 美[ˌredioækˈtɪvɪti]

• n. 放射（性），辐射能；

形容词：radioactive;

例句

• The level of radioactivity in the soil was found to be above recommended limits. 土壤的辐射水平被发现超过规定的限度。
• They argued that only a negligible rise in atmosphere radioactivity resulted from the test. 他们辩解说,由这次试验所造成的大气层放射活动的增加是微不足道的。
• The dismantling of a nuclear reprocessing plant caused a leak of radioactivity yesterday. 昨天拆除核后处理工厂引起了放射物泄漏。
• A metal called uranium gave off a kind of radiation, which Marie Curie later called radioactivity. 一种叫铀的金属发出一种射线, 后来玛丽·居里把这种现象称为放射性.
• At the surface, radioactivity of the conglomerates is locally as high as 30 X background. 在地表, 砾岩的局部地段的放射性高达30倍本底值.
• Overburden had concealed the radioactivity. 覆盖层屏蔽掉了放射性.
• The site was found to be contaminated by radioactivity. 发现此地受放射线污染.
• The soil contains 30 times the acceptable level of radioactivity. 这片土壤受到了高于标准30倍的辐射.
• the process of decontaminating areas exposed to radioactivity 清除受放射污染地区有害物质的过程
• This is a Geiger counter for detecting radioactivity. 这是一种盖革计数管,用来测量辐射的.

柯林斯高阶英汉双解学习词典释义

• ADJ-GRADED
  放射性的;有辐射的
  Something that is radioactive contains a substance that produces energy in the form of powerful and harmful rays.
  例句
  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。

英汉词典释义

• n.
  放射(性)
  The dismantling of a nuclear reprocessing plant caused a leak of radioactivity yesterday. 昨天拆除核后处理工厂引起了放射物泄漏。 The site was found to be contaminated by radioactivity. 发现此地受放射线污染。 They argued that only a negligible rise in atmosphere radioactivity resulted from the test. 他们辩解说,由这次试验所造成的大气层放射活动的增加是微不足道的。
  辐射能
  The level of radioactivity in the soil was found to be above recommended limits. 土壤的辐射水平被发现超过规定的限度。 The soil contains 30 times the acceptable level of radioactivity. 这片土壤受到了高于标准30 倍的辐射。

英英词典释义

• Noun
  1. the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay

行业词典

• 化学： 放射性；
  医学： 放射性，辐射性：导致核裂变的粒子释出、发散或电磁辐射特性；原子量为83以上的所有化学元素均天然具有此一特性，其它全部已知元素亦可人工诱出这一特性；放射现象；
  地质学： 放射性；
  物理学： 放射性；