Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals.
地质年代通常是通过矿物中发现的各种放射性元素的衰变率来获得的。
Like her mother, Irene was awarded a Nobel Prize, along with her husband Frederic in 1935, for producing new radioactive elements.
与她的母亲一样，1935年，艾琳和她的丈夫弗雷德里克因为制造出了新的放射性元素而获得了诺贝尔奖。
Like her mother, Irene was awarded a Nobel Prize, along with her husband, Frederic, in 1935 for producing new radioactive elements.
与她的母亲一样，1935年，艾琳和她的丈夫弗雷德里克（Frederic）因为制造了新的放射性元素而获得了诺贝尔奖。
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。
These minerals can be dated by radioactive decay techniques because of the very small quantities of radioactive trace elements they, in turn, contain.
这些矿物可以用放射性衰变技术测定年代，因为它们所含的放射性微量元素非常少。
But rather than test the radioactive decay using just one method, the researchers used three, involving the elements lead, samarium and neodymium.
但是，相对于仅使用一个方法测试放射性衰变，研究人员测定时使用了三种元素，铅，钐，钕。
This mixture of plutonium and other radioactive elements couldthen be turned into fuel suitable for use in “fast” reactors.
钚和其它的放射性元素的混合物可以转变成适宜“快”反应堆使用的燃料。
These elements may not be quite as radioactive as plutonium, but if ingested or inhaled, they also pose a risk of causing cancer.
这些元素虽然没有钚的放射性那么高，但如果被吞食或吸入，一样会增加患上癌症的几率。
Some elements such as uranium, commonly used as fuel in nuclear power plants, are always radioactive; there is no nonradioactive form of them that naturally occurs in nature.
一些如铀一般的元素，通常在核电厂用作核燃料，都是有放射性的；这些元素由于自身的性质是没有无放射性状态的。
Overheating fuel rods then discharge gaseous forms of certain volatile radioactive elements, including cesium, iodine, strontium and tellurium.
然后过热燃料棒释放出某些气态易挥发放射性元素，比如铯、碘、锶和碲。
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。
A total of 485 zircons held inclusions, and about a dozen or so of these contained radioactive trace elements that allowed the researchers to determine their ages.
总共有485块锆石内部带有包体，其中有十几块包体中含有放射性微量元素，研究者可以根据它们来测定包体的年代。
The reason is that the ash left over when coal is burned contains radioactive elements, notably 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。
Heat from the decay of naturally occurring radioactive elements could keep a planet warm enough for water.
放射性元素在自然衰败过程中所产生的热量能使星球上的水维持液态形式。
The Earth is growing cooler as it loses the heat trapped in its creation and generated by radioactive elements within it.
因为内核失去在其形成时捕捉的热能，而且是通过内核里的放射性元素产生的热能，所以地球正渐渐冷却下来。
Linear No Threshold (LNT) - the methodology to calculate risk from exposure to radioactive elements from the Fukushima Daiiachi disaster.
线性无阈(LNT) - - - - -计算暴来自福岛核放射性元素灾难风险的方法。
Such superheavy elements are usually very radioactive and decay away almost instantly.
这种超重元素通常是具有非常强的放射性，并且几乎立即会发生衰变。
Also in Fukushima City, radioactive elements, including iodine, cesium-135 and cesium-137, were found in drinking water.
福岛市也已在饮用水中发现了碘、铯- 135和铯- 137等放射性物质。
These radioactive elements are by-products of the fission reaction that generates power in the nuclear plants.
这些放射性元素为核电站裂变发电时的副产品。
As nuclear cores melt down, reacting nuclear fuel creates many different radioactive elements, all with different toxic effects.
当核反应堆的核心融化的时候，相互作用的核燃料会产生许多不同的放射性元素，他们的毒性各不相同。
What radioactive elements are being released at the Fukushima Daiichi nuclear power plant?
福岛核电站释放出了哪些放射性元素？
Our modern supply of helium has gradually built up over billions of years in subterranean pockets of natural gas as a byproduct of decaying radioactive elements.
我们现在的氦源，是地下天然气田中放射元素衰变的副产品，经过数十亿年的累积，逐渐形成的。
It lived around 125 million years ago, based on the dating of radioactive elements in the sediments that encased the fossil.
研究者通过对包裹化石的沉积层进行放射性元素年代测定，推断出中华龙鸟生活在1.25亿年前。
The KamLAND detector in Japan can detect anti-neutrinos generated by the decay of uranium and thorium-the two elements responsible for most of the radioactive heating of the Earth.
日本的KamLAND探测器可以检测衰变的铀和钍产生的反中微子，这两种元素产生了地球放射热量中的很大部分。
The downsides were also great. Marie's work with radioactive elements inflicted serious burns to her arms and hands - and perhaps triggered the leukemia that killed her at age 58.
居里夫人长期从事放射性元素研究，身体每况愈下，放射性元素严重灼伤她了胳膊和手臂，或许还引起致她死亡的白血病，年仅58岁。
Radium, uranium, and thorium are radioactive metallic elements.
镭、铀和钍都属于放射性金属元素。
And, he worked for a little less than 10 years at McGill where he did more work on these particles that radiate from radioactive elements.
他在McGill工作了将近10年，在McGill期间做了更多的，关于放射性元素的放射性的工作。
Soils with high clay content tend to bind radioactive elements and hinder their travel, while sandy soils allow more of the radiation to pass into growing food.
粘土比例高的土壤更容易结合放射性元素，阻碍其进一步扩散，沙质土壤中的辐射物质更容易进入作物内。
The four new elements, all of which are synthetic, were discovered by slamming lighter -nuclei into each other and tracking the following decay of the radioactive superheavy elements.
这四种新元素都是人造的，是由火花与原子核相互撞击并且循着放射性超重元素衰变的轨迹而发现的。
The four new elements, all of which are synthetic, were discovered by slamming lighter -nuclei into each other and tracking the following decay of the radioactive superheavy elements.
这四种新元素都是人造的，是由火花与原子核相互撞击并且循着放射性超重元素衰变的轨迹而发现的。
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