名词
中文翻译：初步浓度同义词
同义词：
['initial concentration', 'preliminary concentration']
例句：
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1. The preliminary concentration of the solution is too high.
溶液的初步浓度过高。
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2. During the preliminary concentration stage, the material needs to be filtered out.
在初步浓缩阶段，需要过滤掉材料。
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3. The preliminary concentration of the sample was determined by measuring its absorbance at a specific wavelength.
样品的初步浓度通过测量其在特定波长下的吸光度来确定。