他们发现反射的光线波谱中缺少红外线波长——这段光线被水分子吸收了。
The reflected light was found to be missing infrared wavelengths that are absorbed by water molecules.
不可见，我指的是它不吸收地磁波谱。
By invisible I mean it doesn't absorb in the electromagnetic spectrum.
利用红外吸收光谱及核磁共振波谱仪的一维和二维技术对一种未知聚合物试样进行鉴定。
An unknown polymer was determined by one-dimension and two-dimension technologies of infrared absorption spectroscopy and nuclear magnetic resonance.
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