1
infrared + noun
infrared 作形容词时通常放在名词前，如 infrared light（红外光）、infrared camera（红外摄像机）。
Infrared light is invisible to the human eye.
红外光是人眼看不见的。
红外线；红外辐射
infrareds — plural of infrared
先理解核心含义，再看它在真实句子里的用法。
红外线；红外辐射
the infrared region of the electromagnetic spectrum; electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
Infrared light is invisible to the human eye.
红外光是人眼看不见的。
波长长于可见光但短于微波辐射的电磁辐射,波长介于700纳米至1毫米之间。
The electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm.
该范围内的特定波长。
A specific wavelength in this range.
发射红外辐射的装置。
A device that emits infrared radiation.
The rescue team used an infrared camera to find the missing hiker in the dark forest.
救援队用红外摄像机在黑暗的森林里找到了失踪的徒步旅行者。
Infrared lamps are often placed in food warmers to keep dishes hot.
红外灯常被放在食物保温器里，以保持菜肴温热。
Some reptiles can see infrared light, which helps them locate warm prey.
有些爬行动物能看到红外光，这帮助它们找到温热的猎物。
infrared 作形容词时通常放在名词前，如 infrared light（红外光）、infrared camera（红外摄像机）。
Infrared light is invisible to the human eye.
红外光是人眼看不见的。
作名词时常用在介词 in 后，表示“在红外区/红外波段”。
The telescope can observe in the infrared.
这台望远镜可以观测红外波段。
作名词特指红外区或红外辐射时，要与定冠词 the 连用。
The infrared has a longer wavelength than visible light.
红外线的波长比可见光长。
Not this
This is an infrared's thermometer.
Use this
This is an infrared thermometer.
中文的“红外线的温度计”不能照搬为所有格 infrared's。在英语中，infrared 作定语直接修饰名词，不加 's；只有表示所属关系时才用所有格。
Not this
The remote control uses an infrared to send signals.
Use this
The remote control uses infrared to send signals.
infrared 作名词表示“红外线/红外辐射”时是不可数名词，前面不能用不定冠词 an。若确指某个红外装置，应补出具体名词，如 an infrared transmitter。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
红外辐射
Infrared radiation is invisible to the human eye but can be detected as heat.
红外辐射肉眼不可见，但可以作为热量被探测到。
红外传感器
The security lights are activated by an infrared sensor.
安全灯由红外传感器激活。
红外摄像机
Firefighters use an infrared camera to see through smoke.
消防员使用红外摄像机穿透浓烟观察。
红外光谱分析
The chemist identified the compound using infrared spectroscopy.
化学家利用红外光谱分析鉴定了该化合物。
红外光
Infrared light is used in remote controls to send signals.
红外光用于遥控器发送信号。
红外体温计
The nurse measured the patient's temperature with an infrared thermometer.
护士用红外体温计测量了病人的体温。
Use infrareds naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记：infra-表“下”，red是红，红光“下面”看不见的光，就是红外线。
语域：neutral 常见场景：scientific literature、technical specifications、product documentation infrared 是比较中性的科技术语，通常出现在科学文献、技术规格或产品说明等语境中；日常口语中也会出现，但整体语体仍偏正式。
与 infrared 末尾 /rɛd/ 真正同韵的词：red、bed、bread、head。注意 hundred 和 tired 虽然也以 -red 拼写结尾，但发音不同：hundred /ˈhʌndrəd/，tired /ˈtaɪərd/。
Dictionary facts from ECDICT, WIKTIONARY.