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- KREEP rocks formed at the boundary of lunar crust and mantle, and natural radioactive thorium is one of the elements to demonstrate KRREP rocks distribution. 月球KREEP岩石形成于壳幔的分界层中,天然放射性元素Th是指示KREEP岩分布的主要元素之一。
- By a new technique of decomposition,vitriol was not decomposed,radioactivity thorium came into leaching solution,waste residue was transformed to LLW. 采用新的低温焙烧分解工艺,浓硫酸不分解,放射性钍形成硫酸钍进入水浸液中,废渣成为低放渣。
- Radioactive ray is material thing. 放射线是实际的物质。
- A radioactive isotope of thorium with mass number228. 射钍钍的放射性同位，质量数为
- Radium and uranium are radioactive elements. 镭和铀是放射性元素。
- radioactive thorium 放射性钍
- A certain discharge of possible radioactive effluent. 一定量的可能有放射性的废水。
- 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。
- A naturally occurring or artificially produced radioactive element. 放射性元素自然产生或人为制造的放射性元素
- A radioactive compound used in radiotherapy or diagnosis. 放射性药剂一种用于放射性治疗或诊断的放射性化合物
- The immediate product of the radioactive decay of an element. 继承元素某种元素放射性衰变的直接产物
- Marie found another called thorium. 玛丽发现了另一种物质，叫钍。
- Isotopes that emit radioactive particles; a stove emitting heat. 发射出放射性粒子的同位素; 发出热量的炉子
- I measured the activity of a number of minerals; all of then~ that appear to be radioactive always contain uranium or thorium. 我测量了一些矿物的活性，所有显示放射性的物质均含有铀和针。
- The radioactive waste should be buried deeply under the ground in sealed box. 这些放射性废物应该放在密封的箱子里深埋在地下。
- Deadly weapons; a deadly spill of radioactive waste products. 致命的武器; 导致死亡的核辐射废物的倾倒
- There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine. 铀矿山坑道污水含有铀、镭、钍、钋等放射性核素,外排前必须加以处理。
- Radium is a radioactive element. 镭是个放射性元素。
- The fission products formed are highly radioactive. 所生成的裂变产物具有很强的放射性。
- The radioactive material is stored in a special radiation-proof container. 放射性材料贮存在防辐射的特殊容器内。
