V-prism refractometer

例句：

1. 1. The V-prism refractometer was used to measure the refractive index of the liquid.
   使用分光计测量液体的折射率。
2. 2. The V-prism refractometer is a tool used in optics for measuring the refractive index of materials.
   分光计是一种用于测量材料折射率的工具，在光学中被广泛使用。
3. 3. The V-prism refractometer is an essential tool for scientists and engineers working with optical materials.
   分光计是科学家和工程师研究光学材料时必不可少的工具。