放射金

例句：

1. 1. Theradium in the mineral is incredibly rare.
   这种矿物中的放射性元素极其稀有。
2. 2. Radium has been used in medical treatments fordecades.
   几十年来，镭一直用于医疗治疗。
3. 3. The discovery of radium ledto many advancements in science and technology.
   镭的发现推动了科学和技术的许多进步。