放射锕

例句：

1. 1. The radium in the mineral has a strong radiation.
   这种矿物中的镭有很强的辐射。
2. 2. Radium is a rare and valuable mineral that can be used to make radioactive isotopes.
   镭是一种稀有且有价值的矿物，可以用来制造放射性同位素。
3. 3. Radium is a highly toxic substance that can cause cancer when inhaled or ingested.
   镭是一种高度有毒的物质，吸入或摄入时可能导致癌症。