leuco

例句：

1. 1. 色盲
   Blindness in color perception
2. 2.白化病
   Leukoderma
3. 3. 色素沉着
   Pigmentation
4. 1. He has leukoderma on his left cheek, which makes him look unusually pale.
   他的左脸颊有白斑，使他看起来异常苍白。
5. 2.The patient had a leukoderma on her neck that was causing her discomfort.
   这位病人的脖子上有一块白斑，让她感到不舒服。
6. 3. The leukoderma on the patient's arm was caused by exposure to the sun.
   患者手臂上的白斑是由于暴露在阳光下引起的。