名词
中文翻译：光谱比
同义词：
['spectral index', 'spectral ratio', 'spectral ratio', 'spectral ratio']
例句：
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1.The researchers used a spectral ratio to determine the composition of the sample.
研究人员使用光谱比来测定样本的成分。
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2. The spectral ratio is crucial for the accurate measurement of the material's properties.
光谱比对于准确测量材料的性质至关重要。
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3. The spectral ratio was used to identify the source of the unknown signal.
光谱比被用来识别未知信号的来源。