They used spectroscopy for their analysis: a technique that breaks the light from celestial objects into a spectrum with telltale emission lines indicating which elements are present.
在他们的研究中使用了光谱分析。 光谱分析原理是将天体光源通过光谱仪，通过光谱被减弱的程度，得出样品中元素含量。
They used spectroscopy for their analysis: a technique that breaks the light from celestial objects into a spectrum with telltale emission lines indicating which elements are present.
在他们的研究中使用了光谱分析。 光谱分析原理是将天体光源通过光谱仪，通过光谱被减弱的程度，得出样品中元素含量。
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