flame radiation

例句：

1. 1. The sun's rays are a source of naturallight and warmth.
   太阳的光线是自然光和温暖的起源。
2. 2. Radiant heatis a form of energy that transfersthrough objects without being visible to the humaneye.
   辐射热是一种通过物体而不被肉眼可见的能量形式。
3. 3. Infrared radiationis a type of electromagnetic radiation thatcannot be seen by the human eye.
   红外辐射是一种无法被人类眼睛看见的电磁辐射类型。