radioactive material

• 指含有不稳定原子核的物质，这些原子核会衰变并释放出粒子或电磁波形式的电离辐射。

A substance that contains unstable atomic nuclei, which decay and emit ionizing radiation in the form of particles or electromagnetic waves.

1. Substance emitting radiationB2formal

   A material that contains unstable atomic nuclei that spontaneously decay, emitting ionizing radiation in the form of particles or energy.

   放射性物质

   • Uranium is a naturally occurring radioactive material used in nuclear power plants.
   • Workers must wear protective gear when handling radioactive material.
   • The disposal of radioactive material requires strict safety protocols.

2. Medical isotopeB2formal

   A radioactive substance used in medical diagnostics or treatments, such as cancer therapy.

   医用放射性同位素

   • The hospital uses radioactive material for imaging scans.
   • Radioactive material is carefully administered to patients for targeted therapy.
   • Technetium-99m is a common radioactive material in nuclear medicine.