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- Tritium is one of the mildest radioactive isotopes. 氚是辐射最和缓的放射性同位素之一。
- The breakdown of radioactive isotopes goes on at constant rates. 放射性同位素的衰变在恒定的速率下进行。
- The inferno spewed a deadly plume of radioactive isotopes into the atmosphere. 这个象炼狱般的地方将一缕致死的放射性同位素喷入大气层。
- There are two main types of uses of radioactive isotopes in biochemistry. 在生物化学中,放射性同位素主要有两方面的应用。
- Expectant mothers may not do work connected with radioactive isotopes. 怀孕女工不得做与放射性同位素有关的工作。
- A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素,尤指碳14。
- The large number of radioactive isotopes among the heavy elements fit into three series. 重元素中的大量放射性同位素分属于三个系列。
- There are some radioactive isotopes which are produced artificially by bombardment of nuclei with neutrons. 有几种同位素是用人工方法;以中子轰击原子核生产出来的.
- To increase the amount of one or more radioactive isotopes in(a material, especially a nuclear fuel). 添加元素增加一种同位素或更具有放射性的核素的数量于(一种物质,尤其是核燃料)
- The application of radioactive isotopes to solid state physics and material science is reviewed and the perspectives with high energy radioactive ion beams are discussed. 摘要回顾了放射性核素在固体物理和材料科学中的应用,并对高能放射性束流的应用前景作了展望。
- The import of radioactive isotopes, radial equipments and the articles containing radioactive materials shall be handled according to the relevant provisions of the State. 进口放射性同位素、射线装置和含有放射性物质的物品的,按照国家有关规定办理。
- Gamma rays have proved very helpful in medicine and industry. These rays are also given off by radioactive isotopes obtained as by-products in production processes. 射线已被证实在医学和工业上有很大的用处,这些射线是在生产过程中由放射性同伴素释放出的副产品。
- A radioactive isotope of thorium with mass number228. 射钍钍的放射性同位,质量数为
- Rather they were the products of the decay of radioactive isotopes of iodine, which in turn were formed from radioactive tellurium and so forth, according to a well-known sequence of nuclear reactions that gives rise to stable xenon. 它们其实是碘同位素放射衰变的产物,而碘是由放射性碲产生,依此类推,经由人们所熟知的一系列核反应而产生稳定的氙。
- A radioactive isotope of iodine widely used as a tracer in medical diagnosis. 放射性碘碘的一种放射性同位素,广泛地用于医学诊断作为追踪剂
- A naturally or artificially produced radioactive isotope of an element. 放射性同位素天然存在或人工合成的某种元素的有放射性的同位素
- This paper introduces some problems on application and related mechanism of the radioactive isotopes Rn and Ra measurement in the exploration and exploitation of petrolium and gas. 本文介绍了放射性同位素氡和镭测量在油气勘查与开采中的某些应用和相应的机理。
- She had carried test tubes containing radioactive isotopes in her pocket and stored them in her desk drawer, remarking on the pretty blue-green light that the substances gave off in the dark. 她总是把装有放射性同位素的试管放在口袋里随身携带,或将它们存放在办公桌的抽屉内,这些元素在夜晚总是会发出美丽的蓝绿色光芒。
- The measurement of the decay of radioactive isotopes, especially uranium, strontium, rubidium, argon and carbon,has allowed geologists to more precisely determine the age of rock formations. 对放射性同位素衰变的测量,尤其是铀、锶、铷、氩和碳,可允许地质学家更精确地确定岩层的年龄。