核裂变只能在某种类型的重核及不稳定核素内发生，如铀- 235及钚- 239。
Nuclear fission can only occur in some types of heavy and unstable nuclei such as in the uranium -235 and plutonium -239.
在参量s—h正方形核素图中，介绍了由稳定区边界的系统规律性，确定稳定同位素偶偶核素个数的一种方法。
In the square chart of nuclides of parameters with S-H, it introduces a method determining Numbers of isotopes base on systematic regularities of stable nuclides region.
本文介绍远离稳定性核素研究的一些重要成果，说明从ISOL到放射性束加速的发展趋势。
Some of the highlights of nuclei far from stability were yielded. The trends of development from ISOL to acceleration of ri beams were also described.
放射性核素常危及生态系统的稳定，给人类的生命和健康带来巨大的威胁。
The presence of radionuclides in soils often jeopardizes ecosystem stability and renders a serious risk to human health.
作者用4种稳定性核素标记的支链氨基酸和芳香氨基酸对正常人与重型病毒性肝炎（重型肝炎）患者进行示踪动力学的研究。
The metabolic kinetics of branched chain amino acids (BCAA) and aromatic amino acids (AAA) in normal subjects and patients with severe viral hepatitis as studied with 4 stable isotope labeled tracers.
介绍样品制备、均匀性及稳定性检验、核素定值方法和定值结果。
The sample preparation, homogeneity test, stability inspection and the methods and results for radionuclide certification are described.
此常数具体表现在物质世界核素层次稳定范围常数44与物质运动最高级形式的人类细胞的染色体是2 3对。
The constant specifically shows that scope constant 44 in nuclides layer of matter world and chromosome number of mankind is 23 pairs, which is the highest form of matter motion.
对稳定性稀土元素和几种核素复合示踪土壤侵蚀与泥沙来源研究的国内外研究进展，进行了总结和评价。
The studies of those that stable rare earth elements trace soil erosion process and several nuclides are compounded together to distinguish source of sediment are also summarized and evaluated.
对稳定性稀土元素和几种核素复合示踪土壤侵蚀与泥沙来源研究的国内外研究进展，进行了总结和评价。
The studies of those that stable rare earth elements trace soil erosion process and several nuclides are compounded together to distinguish source of sediment are also summarized and evaluated.
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