infrared spectrum fingerprint spectrum
But soon afterwards some researchers began to add the word group “fingerprint spectrum” to the name of the spectrum actually taken to form another word group, such as “infrared spectrum fingerprint spectrum”.
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infrared spectrum fingerprint spectrum
红外光谱指纹光谱
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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In addition to taking normal images of the impact in the visible spectrum, the HRI provides an infrared "fingerprint" of the material from inside the comet's nucleus.
BBC: Q&A: Deep Impact comet mission