spot comparism exposure meter

例句：

1. 1. This spot comparison exposure meter is used to measure the amount of light that passes through a sample.
   这个斑点比较曝光计用于测量穿过样本的光量。
2. 2. The spot comparison exposure meter was used to compare the color of different samples.
   斑点比较曝光计被用来比较不同样品的颜色。
3. 3. The spot comparison exposure meter was used to detect any defects in the material.
   斑点比较曝光计被用来检测材料中的任何缺陷。