radiation

• 名词，指能量以波或粒子的形式发射或传播，常与核过程、电磁波或放射性衰变相关。

A noun referring to the emission or transmission of energy in the form of waves or particles, often associated with nuclear processes, electromagnetic waves, or radioactive decay.

不可数

1. Energy emissionB2formalscientific

   The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.

   辐射

   • The sun emits radiation that is essential for life on Earth.
   • Scientists measure radiation levels near nuclear power plants.
   • Exposure to high levels of radiation can be harmful to health.

   同义词emanationemission

2. Medical treatmentB2formalmedical

   The use of high-energy radiation, such as X-rays or gamma rays, to treat diseases like cancer.

   放射治疗

   • The patient underwent radiation therapy for her tumor.
   • Doctors carefully target the radiation to minimize damage to healthy tissue.
   • Radiation treatment can have side effects like fatigue.

   同义词irradiationradiation therapyradiotherapyx-ray therapy

3. Heat transferB2formalscientific

   The transfer of heat energy through space by electromagnetic waves, without requiring a medium.

   辐射

   • Heat from the sun reaches the Earth by radiation.
   • A campfire warms you through radiation.
   • Thermal radiation is emitted by all objects above absolute zero.