这种原子通过释放射线从不稳定状态变到更加稳定的状态的过程被称为核衰减或放射。
The process by which an atom changes from an unstable state to a morestable state by emittingradiation is called radioactive decay or radioactivity.
比相邻的1号和3号反应堆积水的核放射性水平也要高出1千倍以上。
At that level it is a thousands times more radioactive than water found in the neighboring Number-1 and -3 reactor buildings.
虽然日本这一核电站的核芯全部熔解仍然有可能释放出放射性气体，但这些气体往往会消散在大气里。
A full meltdown at the Japanese facility would still release radioactive gases, but those tend to dissipate in the atmosphere.
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。
Linear No Threshold (LNT) - the methodology to calculate risk from exposure to radioactive elements from the Fukushima Daiiachi disaster.
星期一，一列装载着核弹级铀材料的专列到达了一处俄罗斯的安全设施。这些核材料来自波兰的一个研究用的反应堆，运送它们，是为了确保世界各地的危险的放射性物质安全的努力的一部分。
A shipment of bomb-grade uranium arrived at a secure facility in Russia on Monday, sent from a research reactor in Poland as part of a race to secure dangerous radioactive material around the world.
这使福岛达到了在25年前这个月发生的切尔诺贝利核灾难的高度(尽管福岛泄露的放射性物质只是切尔诺贝利泄露的十分之一，而且没有人死于泄露的放射性物质)。
That places it on a par with the Chernobyl disaster 25 years ago this month (though the radiation released at Fukushima is only a tenth of Chernobyl's, and nobody has died from it yet).
确认有助于核材料安全的措施对于放射性材料安全具有价值，并鼓励为确保此类材料的安全作出努力。
Recognize that measures contributing to nuclear material security have value in relation to the security of radioactive substances and encourage efforts to secure those materials as well.
氡子核在衰变时发射出放射性阿尔法粒子，这些粒子可附着于空气中的浮质、灰尘及其它粒子。
As radon progeny decay, they emit radioactive alpha particles and attach to aerosols, dust and other particles in the air.
一位发言人声称燃料棒的金属镀层可能已经溶毁，暴露出放射性核芯。
It was possible the rods' metal cladding had melted, exposing the radioactive core, a spokesman said.
阿尔法粒子是氦核，它们是放射性衰变的产物。
Alpha particles are these helium nuclei, and they are the result of radioactive decay.
以后的三十年里，物理学发生了天翻地覆的变化：电子、原子核、放射性、量子理论、相对论相继出现。
The next three decades turned physics on its head, with the discovery of electrons, atomic nuclei, radioactivity, quantum theory and the theory of relativity.
由于没有电力将需要的水泵出以冷却原子核，工程师们将放射性的蒸汽排到空气中以减轻压力。
Lacking electricity to pump water needed to cool the atomic core, engineers vented radioactive steam into the atmosphere to release pressure.
1946年到1958年，在马绍尔群岛北部进行了67次核试验，释放出的放射性碘造成的污染据说比1986年切尔诺贝利核灾难带来的污染严重150倍。
The 67 tests conducted in the northern Marshalls between 1946 and 1958 released radioactive iodine said to be 150 times worse than the contamination from the nuclear disaster at Chernobyl in 1986.
我们有一些放射性同位素，这些同位素会自发变成其他的原子核。
You've got some radioactive isotopic that can spontaneously decay into some other nucleus.
核能发电不会排放温室气体，然而这项技术的确存在另一个不好对付的副产品：放射性核废水。
NUCLEAR power does not emit greenhouse gases, but the technology does have another rather nasty by-product: radioactive waste.
“对海产品的仔细检测是十分重要的”，她在一份邮件中指出，“因为很多放射性核在环境中富集。”
"It is extremely important that seafood be carefully monitored," she said in an E-mail. "This is because many of the radionuclides are concentrated in the environment," she added.
“对海产品的仔细检测是十分重要的”，她在一份邮件中指出，“因为很多放射性核在环境中富集。”
“It is extremely important that seafood be carefully monitored,” she said in an e-mail. “This is because many of the radionuclides are concentrated in the environment,” she added.
贴梗海棠行至消防员不能到的地方，并能检测当地的化学、生物、放射性物质及核物质的含量。
Quince rolls on treads and can sense chemical, biological, radiological or nuclear dangers in areas that firefighters can't reach.
课题小组选择了140个活动星系核，或简称agns，这些星系都放射出大量的X射线，X射线能穿透阻挡观测的气体和尘埃。
The team chose 140 active galactic nuclei, or AGNs, by selecting galaxies that emit a lot of X-rays, which can Pierce the galactic gas and dust that might otherwise block the nuclei from view.
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.
更重要的是，这个工业至今已制造出将近30万公吨的高放射性核垃圾，而且数量还在继续增加。
What's more, the industry has so far generated nearly 300, 000 tonnes of high-level nuclear waste, and counting.
利用豚草及核放射物对沉积物进行年代推定。
在韩国，核安全官员表示，他们在首尔和其他几个地区发现了放射性碘。
In South Korea, nuclear safety officials say they have found radioactive iodine in Seoul and several other areas.
剩余核一般说来将发生一次放射性衰变。
The residual nucleus will, in general, undergo a radioactive transformation.
剩余核一般说来将发生一次放射性衰变。
The residual nucleus will, in general, undergo a radioactive transformation .
放射生物学的学位证书是将来成为放射肿瘤学家、癌症治疗研究员、核安全从业者、基因工程师或其他相关人员的踏脚石。
A degree in radiobiology can be a stepping stone to a career as a radiation oncologist, or a researcher in cancer treatment, nuclear safety, genetic engineering, and other fields.
粒子是从天然放射性蜕变得到的带正电的氦核。
Alpha particles are positively charged helium nuclei obtained from natural radioactive decay.
粒子是从天然放射性蜕变得到的带正电的氦核。
Alpha particles are positively charged helium nuclei obtained from natural radioactive decay.
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