1·The time required for the energy released by a radionuclide to decrease by half (i.e., the "half-life") range from tiny fractions of a second to millions of years depending on the type of atoms.
放射性核素释放的能量减半需要的时间范围是几分之一秒到几百万年，取决于原子的类型。
2·This article presents an indirect method of labelling proteins. an organic compound is labelled by radionuclide and then the compound is conjugated to a protein.
本文报道间接法标记蛋白质：首先用放射性核素标记一种有机化合物，然后将此种化合物偶联到蛋白质上。
3·The survey of natural radionuclide contents in soil in China(1983—1990)is a part of investigation of environmental natural radioactivity level on China.
中国土壤中天然放射性核素含量调查（1983—1990年）是中国环境天然放射性水平调查研究的一部分。
4·Objective To evaluate the clinical value of radionuclide pulmonary perfusion imaging in diagnosing acute pulmonary embolism.
目的评价放射性核素肺灌注显像在诊断急性肺动脉栓塞中的价值。
5·Based on the single fracture transport model from the double media theory, the paper introduces the simulation method of the radionuclide transport behavior in the fractured media.
该文以基于双重介质理论的单裂隙迁移模型为基础，介绍裂隙介质中放射性核素迁移行为的模拟方法。