phencapton

例句：

1. 1.The teacher used a drop of phencapton to highlight the important points in the text.
   老师用一滴酚酞来强调文本中的重要点。
2. 2. The chemical reaction between phencapton and water is very fast.
   酚酞与水之间的化学反应非常快。
3. 3. Phencapton is commonly used as a color indicator in chemical analysis.
   酚酞常被用作化学分析中的颜色指示剂。