脸上有白斑的

例句：

1. 1. The patient had a white patch on his forehead.
   病人额头上有一块白斑。
2. 2. The doctor examined the patient's white patch and found it to be a rash.
   医生检查了患者的白斑，发现它是皮疹。
3. 3. The white patch on her arm was caused by an infection.
   她手臂上的白斑是由感染引起的。