phthaleins

例句：

1. 1. The phthaleins in the solution glow under ultraviolet light.
   溶液中的荧光素在紫外线下发光。
2. 2. The phthaleins were used to stain the specimen.
   荧光素被用来给标本染色。
3. 3. The phthaleins are used in various applications, such as medical imaging and forensics.
   荧光素在各种应用中都有使用，比如医学成像和法医科学。