n. the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
n. electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
s. having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
a. 红外线的
n. 红外线
1. The remote control uses infrared signals to communicate with the TV.
遥控器使用红外信号与电视进行通信。
2. Infrared cameras can detect heat from objects, making them useful for night vision.
红外摄像头可以检测物体的热量，这使它们在夜视中非常有用。
3. Scientists study infrared radiation to learn more about the universe.
科学家研究红外辐射以了解更多关于宇宙的知识。