radiation chemical engineering

例句：

1. 1. The scientist used aradioactive substance to study the properties ofmatter.
   科学家使用放射性物质来研究物质的性质。
2. 2. Radiation therapy is often used totreat cancer.
   放射疗法通常用于治疗癌症。
3. 3.The radiation from the sun can damage livingorganisms.
   太阳的辐射可以损害生命体。