处理同时进行的辐射泄漏的风险，以及处理放射性钍是困难和昂贵。
Processing runs the risk of radiation leaks, and disposing of the radioactive thorium is difficult and costly.
这颗晕星不同于大多数超新星，它吐出的许多元素比铁还重，其中包括放射性钍和铀。
Unlike most supernovae, this one spewed lots of elements far heavier than iron, including radioactive thorium and uranium.
氦是钍和铀元素数千年放射性衰变的副产品。
Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
他们当时对一种放射性元素钍很感兴趣，这种元素能驱动核反应堆，却不能制造生产成武器。
They had been interested in thorium — a radioactive element that can fuel nuclear reactors but not be processed into weapons.
当氦衰变成为氦-3相对于我们在太阳里看到的那它就可用了，因为地球上多数的氦-4是通过元素铀和钍自然放射性衰变而造成的。
What helium is available is depleted in helium-3 relative to what we see in the sun, because most of Earth's helium-4 is freshly made via natural radioactive decay of the elements uranium and thorium.
稀土矿山常常也含有放射性元素，比如铀和钍。
Rare earth mines often also contain radioactive elements, such as uranium and thorium.
理由是煤燃烧过后省些的煤灰含有放射性元素，尤其是铀和钍。
The reason is that the ash left over when coal is burned contains radioactive elements, notably uranium and thorium.
他们用皮埃尔所发明的仪器来进行测量。玛丽注意到钍元素也是具有放射性的。
Using Pierre’s invention to make the measurements, Marie noted that thorium was radioactive.
此外，钍所产生的废弃物几乎不可能转变成钚，其放射性危险延续100多年，而不是数千年。
In addition, the waste products generated by thorium are virtually impossible to turn into plutonium - and they remain dangerous for hundred of years rather than thousands.
镭、铀和钍都属于放射性金属元素。
Radium, uranium, and thorium are radioactive metallic elements.
西方公司打算扩大中国以外的稀土矿产量，但这其中储量较大的稀土矿比中国华南的稀土矿复杂的多，这些矿往往伴生着放射性的铀和钍，开采起来很复杂。
Companies want to expand production outside China, but most rare-earth deposits, unlike those in southern China, are accompanied by radioactive uranium and thorium that complicate mining.
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。
There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine.
介绍了一种测定滑石粉中放射性核素铀钍的简便、快速且灵敏的方法。
A simple, quick, and sensitive method to determine the radioactive nuclides of uranium and thorium in talc is described.
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。
There are some radioactive nuclides such as uranium, radium, thorium and polonium in pit effluent of uranium mine. The effluent must be treated before discharging.
氡及其子体是铀、钍等放射性元素产物，是引发肺癌的重要致病因子。
The radon and its daughter elements are the decay products of the radioactive elements such as uranium and thorium and the important carcinogenic factor of causing the lung cancer.
通过塔里木盆地不同层系沉积岩石中放射性元素铀、钍、钾的含量实测数据，计算了不同岩石的生热率。
The paper presents the heat generation rate on the bases of measurements of the contents of uranium, thorium and potassium for different types of sedimentary rock in Tarim basin.
硼砂对放射性物质—铀和钍起到从锆英砂中分离的作用。
The borax plays the role of separating radioactive materials-uranium and thorium from the zircon sand.
答：钍钨极仍是直流焊最常用的钨电极。但许多人开始避而远之，因为该元素具有放射性。
A: They remain the most common tungsten used in DC applications, but many people are starting to shy away because of the element's radioactivity.
以512矿床为例，研究了砂岩铀矿体铀、钍含量及其放射性同位素分布规律，由此讨论铀矿体的定位条件。
Exemplified by No. 512 uranium deposit, this paper discusses the delineation of ore bodies in sandstone type uranium deposits by uranium and thorium concentrations and their radioisotopes.
以512矿床为例，研究了砂岩铀矿体铀、钍含量及其放射性同位素分布规律，由此讨论铀矿体的定位条件。
Exemplified by No. 512 uranium deposit, this paper discusses the delineation of ore bodies in sandstone type uranium deposits by uranium and thorium concentrations and their radioisotopes.
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