我们脚下深处是地狱般的岩石汤，在温度非常高的地球地幔中，有毒的铀、钍和钾元素的同位素释放出的辐射流不断地对这些岩石汤进行加热，使其保持高温。
Deep underneath your feet is a hellish stone soup, kept hot by a torrent of radiation from poisonous isotopes of uranium, thorium and potassium in the earth's superheated mantle.
目前情况下值得忧虑的是电离辐射，它由重同位素——如碘131和铯137——自发衰变而生成。
Of concern in the current situation is ionizing radiation, which is produced by spontaneously decaying heavy isotopes, such as iodine 131 and cesium 137.
这些癌症其实是可以避免的，只要在受到辐射之后，马上给儿童们服用不具有放射性的碘的同位素做成的药片。
These cancers can be prevented if children are given pills containing the non-radioactive isotope of iodine soon after exposure.
专家们说相关辐射危险性很小，因为氮的同位素氮16只会存在5秒钟。
Experts have played down the dangers, arguing that the isotope of nitrogen known as nitrogen-16 lasts for only five seconds.
这些物质被称作“放射性同位素”—同一种元素的变种，他们具有异常的中子数量，频繁的衰变和放出辐射。
These materials are known as "radioisotopes" -versions of an element that, because they have an abnormal number of neutrons, frequently decay and release radiation.
树木年轮的碳同位素和冰核中钚同位素的检测都显示出在上述阶段的大多数时间内太阳辐射能量出现下降。
Isotopes of carbon in tree rings and beryllium in ice cores show a drop-off in solar radiation during much of the period.
癌症的风险是由遭到辐射时的年龄和在特定组织中聚集的放射性同位素决定的。
Cancer risk is determined by the age at exposure and concentration of radioisotopes in particular tissues.
于是，放射性同位素发出的辐射冲击将会破坏邻近的肿瘤细胞。
Then the blast of radiation emitted by the radioisotope would destroy the... tumor cells nearby.
欧盟297/2011号法令把食物和饲料中允许的最高辐射和放射性同位素水平提到相当高的水平。
EU ordinance 297/2011 raises the Maximum Levels of radiation and radioactive isotopes for food and feed to rather serious levels.
采用原子蒸气束激光诱导荧光法测量钆原子的第一激发态的同位素位移及超精细结构、原子跃迁自发辐射的分支比和原子蒸气束的多普勒宽度。
The isotope shifts, hyperfine structure, spontaneous emission branch ratio of the first excited level and Doppler width of the atom vapor beam were measured using laser induced fluorescence.
分析表明，同位素替代改变了晶格振动的频谱，对无辐射跃迁产生很大的影响。
It has been shown that the isotope substitution changes the spectrum of lattice vibration, and brings forth a great influence on the non-radiative transition.
提出了采用可调谐TEACO2超辐射激光器对硼同位素分离的研究方法。
The separation of boron isotopes is studied by tunable TEA CO2 superradiance laser.
提出了采用可调谐TEACO2超辐射激光器对硼同位素分离的研究方法。
The separation of boron isotopes is studied by tunable TEA CO2 superradiance laser.
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