differential photometry

例句：

1. 1.Differential photometry is a technique usedto measure the intensity of light reflected fromsurfaces.
   差分光度学是一种用于测量表面反射光强度的技术。
2. 2. In differentialphotometry, two or more samples arecompared to determine their differences in reflectance.
   在差分光度学中，将两种或多种样本进行比较以确定它们的差异反射率。
3. 3. Theresearcher used differential photometry to study the effects oftemperature on the color of flowers.
   研究者使用差分光度学研究温度对花朵颜色的影响。