radioactive decon tamination of soils

例句：

1. 1. The scientist used a radioactive substance to test the sample.
   科学家使用一种放射性物质来测试样本。
2. 2. The researcher found that the soil was radioactive due to the presence of uranium.
   研究员发现，由于铀的存在，土壤是放射性的。
3. 3. The government decided to decontaminate the area with radioactive material to eliminate any contamination.
   政府决定用放射性物质处理该区域以消除任何污染。