光谱测定分析显示某个光频率被吸收了，就可间接测到这个分子存在于样本中。
Spectrometry analysis showed which frequencies of light were absorbed, in turn an indirect measure of which molecules were in the sample.
他们有光谱分析的方法测定它们的颜色，看它们是饱经风霜的还是新鲜的，然后把这个数据和近地小行星的轨道历史测量数据结合起来分析。
They used a process called spectroscopy to determine their colors, to see if they were weathered or fresh, and then combined this data with measurements of the NEAs' orbital histories.
经熔点测定和红外光谱分析，确证产品是苯酚。
The product was characterized by melt point and IR spectra analysis.
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