radiochemical

例句：

1. 1.Radioactive materials are used in medical imaging and cancer treatments.
   放射性物质用于医学成像和癌症治疗。
2. 2. The research team discovered a new radioactive element.
   研究小组发现了一种新的放射性元素。
3. 3. Radioactive waste is a major environmental concern due to its potential to contaminate groundwater.
   由于可能污染地下水，放射性废物是一个重要的环境问题。