radioactivity

剑桥词典

the quality that some atoms have of producing a type of energy that can be very harmful to health
放射（性）

the energy produced by atoms in this way
放射線；輻射線；輻射能
A dangerous amount of radioactivity was released into the environment last month . 上個月泄漏了大量的放射線，造成很大危險。 返回 radioactivity