Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
氦是钍和铀元素数千年放射性衰变的副产品。
The calculation from the neutrino work yields 20 terawatts for uranium and thorium.
从中微子工作计算出铀和钍约产出20太瓦。
Compared to uranium, thorium is far more abundant as well as much more energy-dense.
与铀相比，钍的储藏量更为丰富，能量密度也更高。
Rare earth mines often also contain radioactive elements, such as uranium and thorium.
稀土矿山常常也含有放射性元素，比如铀和钍。
Using Pierre’s invention to make the measurements, Marie noted that thorium was radioactive.
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。
Marie found another called thorium.
玛丽发现了另一种物质，叫钍。
Marie found another called thorium .
玛丽发现了另一种物质，叫钍。
Uranium or thorium ores and concentrates.
铀或钍矿砂及其精矿。
Radium, uranium, and thorium are radioactive metallic elements.
镭、铀和钍都属于放射性金属元素。
China's dash for thorium power could alter the energy landscape.
中国大力研发钍能，将改变世界能源景观。
Followed by the slow decomposition of uranium to another element thorium.
铀元素随后缓慢分解为另一种元素钍。
The borax plays the role of separating radioactive materials-uranium and thorium from the zircon sand.
硼砂对放射性物质—铀和钍起到从锆英砂中分离的作用。
Are we able to invent new type of reactor so as to burn the uranium more efficiently, or burn thorium?
我们能否发明新式反应堆让铀原料和钍原料更有效地燃烧？
Potassium, phosphorus and thorium are other elements that lunar rocks have to offer a potential mining venture.
钾、磷、钍是月岩可向将来的采矿企业提供的其它元素。
In the energy sector, excluding oil and gas, these include coal, lignite, uranium, and thorium and tar sands.
关于能源，除了石油和天然气，还包括煤、褐煤、铀、钍和沥青。
The crust granites have higher lead isotope ratios and are richer in uranium lead but poorer in thorium lead.
壳型花岗岩具较高的铅同位素比值和富铀铅贫钍铅的特点；
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。
They had been interested in thorium — a radioactive element that can fuel nuclear reactors but not be processed into weapons.
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。
A simple, quick, and sensitive method to determine the radioactive nuclides of uranium and thorium in talc is described.
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。
There are three naturally occurring radioactive series - the thorium series, the actinium series, and the uranium series.
有三个天然存在的放射系列，即钍系、锕系和铀系。
The sources, forms of transportation and precipitation mechanisms of uranium and thorium are also discussed in this paper.
本文还讨论了铀、钍的来源、搬运形式和沉淀机理。
Article 38 Any unit that exploits uranium (thorium) mine shall draw up plans for decommissioning of uranium (thorium) mines.
第三十八条铀(钍)矿开发利用单位应当制定铀(钍)矿退役计划。
Calculations suggest, for instance, that in the nucleus of the isotope thorium-229 is a transition that should emit ultraviolet rays.
举例来说，计算表明，钍- 229的原子核内存在着能发出紫外线的转变过程。
Sorensen estimates that between 5, 000-6, 000 tonnes of thorium could produce as much energy as the world currently consumes each year.
索伦森估计，5000- 6000吨的钍就可以产生相当于目前世界上每年能耗量的能源。
Rare earth elements and thorium in RE-Nb-Ta ores were determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
用等离子体发射光谱法测定了稀土铌钽矿中的稀土元素和钍量。
In this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium.
地质学家在石笋上钻孔，使用铀衰变成钍的同位素的方法确定它们的年龄。
The above results indicated that malignant transformation of golden hamster embryo cells was directly induced by thorium dioxide in vitro.
上述结果表明钍在体外可直接诱发金黄地鼠胚胎细胞的恶性转化。
Proponents of the technology say thorium is more abundant than uranium and does not involve the release of large quantities of carbon dioxide.
这项技术的支持者称，钍的储量比铀更多，而且不会产生大量的二氧化碳。
Proponents of the technology say thorium is more abundant than uranium and does not involve the release of large quantities of carbon dioxide.
这项技术的支持者称，钍的储量比铀更多，而且不会产生大量的二氧化碳。
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