1·But rather than test the radioactive decay using just one method, the researchers used three, involving the elements lead, samarium and neodymium.
但是，相对于仅使用一个方法测试放射性衰变，研究人员测定时使用了三种元素，铅，钐，钕。
2·Most famously, uranium-238 decays into lead-206 with a half life of 4.5 billion years, though radioactive rubidium and samarium are also useful for dating things billions of years old.
最为有名的就是铀- 238衰变为铅- 206的半衰期为45亿年，当然放射性铷和钐也同样对测算几十亿年前的物体的年龄很有用。
3·The source, influence and control of the impurity elements in samarium are described in this paper.
本文在实验的基础上论述了钐中杂质的来源，影响及控制方法。
4·The source, influence and control of the impurity dements in samarium are described in this paper.
本文在实验的基础上论述了钐中杂质的来源，影响及控制方法。
5·The paper reports the measurement of 78 high-lying levels in samarium atoms by two-colour three-photon resonant ionization.
本文报道用双色三光子共振电离法测量钐原子高激发态78个新能级。