photometric calibration

例句：

1. 1.The photometric measurements of the light sourceare crucial for the accuracy of the experiment.
   光源的光度测量对于实验的准确性至关重要。
2. 2.The photometric analysis of the chemical reactionprovides valuable insights into its mechanism.
   化学反应的光度分析为理解其机制提供了宝贵的见解。
3. 3. The photometric measurement of thesample is essential for determining its concentration accurately.
   样品的光度测量对于准确确定其浓度至关重要。