您要查找的是不是：
- radioactive decay rule 放射衰变规律
- 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
- On the basis of distribution of radioactive elements and geological background , the theory equation of radon exhalation rate is derived from the decay rule of radioactive elements and gas diffusion. 根据放射性元素分布规律、地质背景及放射性元素衰变等，建立了计算氡析出率的理论公式。
- 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。
- 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。
- The basic reason is the dictatorial and decayed rule. 原因是多方面的，其中：1、独裁腐败的统治是外交失败的根本原因；
- The growth and decay rule of Sheath Bligh of Rice was studied by spot espial and meteorogy observation in The Rice Area of Hanzhong. 摘要采用定点观察的方法，结合当地气象资料，研究了汉中稻区水稻纹枯病的田间消长规律。
