microdensitometer

例句：

1. 1.The microdensitometer was used to measure the density of the liquid.
   微密度计被用来测量液体的密度。
2. 2.The microdensitometer was used to analyze the chemical composition of the sample.
   微密度计被用来分析样品的化学组成。
3. 3. The microdensitometer was used to determine the concentration of the substance in the solution.
   微密度计被用来确定溶液中物质的浓度。