构成干酪素和奶酪的分子反射光线。

The molecules that make up Casein and cream reflect light.

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除此以外，当可见光波从这些分子上反射出去时，它会向四面八方扩散。

And on top of that, when that visible radiation bounces off those molecules, it scatters in all directions.

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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.

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