the process of decontaminating areas exposed to radioactivity清除受放射污染地区有害物质的过程The soil contains 30 times the acceptable level of radioactivity.这片土壤受到了高于标准30倍的辐射.The site was found to be contaminated by radioactivity.发现此地受...
This is a Geiger counter for detecting radioactivity.这是一种盖革计数管,用来测量辐射的.A metal called uranium gave off a kind of radiation, which Marie Curie later called radioactivity.一种叫铀的金属发出一种射线, 后来玛丽·居里把这种现象称为放射性.The site was found...