定影剂

例句：

1. 1. The developer is essential for developing the photographic film.
   显影剂对于开发感光胶片至关重要。
2. 2. The photographer used a special developer to enhance the image quality.
   这位摄影师使用了一种特殊的显影剂来提高图像质量。
3. 3. The developer was applied evenly on both sides of the glass slide.
   显影剂均匀地涂在玻璃载玻片的两面上。