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The immediate product of the radioactive decay of an element. 继承元素某种元素放射性衰变的直接产物
To disintegrate or diminish by radioactive decay. 衰变由于放射性衰变而解体或缩小
Measurement of geologic time,as through isotopic radioactive decay. 地质年代测定是通过放射性同位素衰变来测定的。
Rutherford first identified the action of probability in radioactive decay. 卢瑟福首先认识到几率在放射性衰变中的作用。
Any of several radioactive gases that are isotopes of radon and are products of radioactive decay. 射气几种氡的同位素的放射性气体，是放射性物质衰变的产物
Measurement of geologic time, as through isotopic radioactive decay. 地质年代测定通过放射性同位素衰变来测定地质年代
Rutherford first identified the action of probability in radioactive decay . 卢瑟福首先认识到几率在放射性衰变中的作用。
Radioactive decay is still a major concern for the people in this area. 放射性衰变仍是这一领域人们的一个主要顾虑。
The time required for the radioactivity of material taken in by a living organism to be reduced to half its initial value by a combination of biological elimination processes and radioactive decay. 半减期被活的有机体摄入的放射性元素经过生物衰减及放射性衰变过程综合，其剂量减至一半所需要的时间
However, some of the minerals contain xenon isotopes unlike those usually produced by radioactive decay of uranium. 然而，有些含氙同位素的矿物并非如此，是由铀的放射性衰变产生的。
The time required for half the nuclei in a sample of a specific isotopic species to undergo radioactive decay. 半衰期放射性样品的原子核经历一半放射性衰变所需要的时间
The design shall take into account the radioactive decay of the fission and activation products. 核反应堆的设计应考虑到裂变和活化产物的放射性衰变。
It had been used for practical ends, to identify elements and to unravel radioactive decay chains. 已将其用于实践的目的，去鉴别元素和阐明放射性衰变系。
Variations from place to place are due to factors such as rainfall, evaporation, biological activity and radioactive decay. 由于受降雨、蒸发、生物活动以及放射性衰变等因素的影响，不同的海区海水盐度也不同。
This isotope forms by the radioactive decay of potassium 40, which is sequestered in the rocks deep in Titan's core. 氩40是钾40放射性衰变后所产生，而钾40位在泰坦核心深处的岩石内。
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。
Chemistry also uses calculus in determining reaction rates and radioactive decay. 化学也使用演算在确定反应速率和放射性衰变。
Variations from place to place are due to factors such as rainfall,evaporation,biological activity and radioactive decay. 由于受降雨、蒸发、生物活动以及放射性衰变等因素的影响，不同的海区海水盐度也不同。
From their work emerged the picture of radioactive decay that is still valid-a violently disruptive explosion of a single atom. 根据他们的工作，展现出至今仍然成立的关于放射性衰变的图象--单个原子的强烈的分裂性爆炸。
Wilson's model, however, predicted that radioactive decay and cosmic-ray collisions would produce too few runaway electrons to cause lightning. 然而，威尔森的模式预测，放射性衰变以及宇宙射线撞击所产生的逃逸电子太少，无法引起闪电。