actinoid elements

例句：

1. 1.The element uranium is a key component of nuclear power plants.
   铀元素是核电站的关键成分。
2. 2.Scientists are studying the properties of actinoids to improve their applications in medicine.
   科学家们正在研究actinoids的性质，以改进其在医学上的应用。
3. 3.The discovery of new actinoids has opened up new possibilities for medical treatments.
   新发现的actinoids为医学治疗开辟了新的可能性。