This light is passed through a prism, which breaks it up into a spectrum, and a unique pattern, kind of like a chemical fingerprint of spectral lines for that element appears.

铁块会一直加热，直到到达某一燃点，便会辐射出光来；而当它的光线穿过一块棱柱时，棱柱就会分割光线，形成光谱。

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Exposure to a particular gas yields a specific pattern of colored dots, providing a chemical fingerprint.

暴露于某种气体会产生一个彩色斑点，成为化学指纹图谱。

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A biomarker protein is a telltale chemical fingerprint that can be detected in parts of the body, such as blood or spinal fluid.

生物标志物蛋白是能够体现内在信息的化学特征，它们在诸如血液和脊液的身体部分中被检测到。

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SmartWater has a chemical fingerprint that links to a crime scene and is only visible under ultra violet light.

BBC: Prestbury war memorial

NEAR-Shoemaker was then able to produce a "fingerprint" of the asteroid's chemical makeup, mission scientists said.

CNN: Asteroid Eros resembles 'building blocks' of Earth