protein refractometer

例句：

1. 1. The protein refractometer is used to measure the concentration of proteins in a sample.
   蛋白质折射仪用于测量样品中蛋白质的浓度。
2. 2. The protein refractometer was developed by Dr. Smith to help researchers better understand the structure of proteins.
   蛋白质折射仪是由史密斯博士开发出来的，帮助研究人员更好地理解蛋白质的结构。
3. 3. The protein refractometer has become an essential tool for analyzing the composition of biological samples.
   蛋白质折射仪已成为分析生物样本组成的关键工具。