radioactivity

1.The site was found to be contaminated by radioactivity.

发现此地受放射线污染。

2.The dismantling of a nuclear reprocessing plant caused a leak of radioactivity yesterday.

昨天拆除核后处理工厂起了放射物泄漏。

3.The level of radioactivity in the soil was found to be above recommended limits.

土壤的辐射水平被发现超过规定的限度。

4.They argued that only a negligible rise in atmosphere radioactivity resulted from the test.

他们辩解,次试验所造成的大气层放射活动的增加是微不足道的。

5.The zirconite is one of mineral resources associated with radioactivity.The exploitation and uses of zirconite would lead to pollution to the environment.

锆英砂是一种伴生矿资源,锆英砂的开发利用会对环境产生放射性污染。