Something that is radioactive contains a substance that produces energy in the form of powerful and harmful rays.
双语例句
例： The government has been storing radioactive waste at Fernald for 50 years.
该政府50年来一直在弗纳德储存放射性废物。
例： 24.7 tonnes of highly radioactive fuel.
24.7吨高放射性的燃料。