radioactive statistical fluctuation

例句：

1. 1. The scientists found that the substance was radioactive.
   科学家们发现这种物质是放射性的。
2. 2. The atomic bomb was radioactive and could cause cancer.
   原子弹是放射性的，可能引起癌症。
3. 3. Radioactive waste is a serious environmental problem.
   放射性废物是一个严重的环境问题。