pteryxin

例句：

1. 1. Pteryxin is a common chemical used in dyeing and printing.
   石蕊是一种常见的染料和印刷中使用的化学物质。
2. 2.The phenolphthalein test is used to detect the presence of bile in the blood.
   酚酞试验用于检测血液中是否存在胆汁。
3. 3. Methylene blue is used as an antiseptic in wound care.
   甲基蓝用作伤口护理中的抗菌剂。