名词
中文翻译：无光谱分光光度计
同义词：
['null detector', 'null instrument']
例句：
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1.The null spectrophotometer was used to measure the absorption of light by the sample.
使用无光谱分光光度计测量样品对光的吸收。
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2. The null spectrophotometer was used to determine the concentration of a chemical compound in a sample.
使用无光谱分光光度计确定样本中化学化合物的浓度。
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3.The null spectrophotometer was used to analyze the spectral properties of a material.
使用无光谱分光光度计分析材料的光谱特性。