discoloration [dɪsˌkʌləˈreʃən]

例句:

• discoloration caused by the sun
  因日照引起的退色
  
• Valuably diminishes dark circle and discoloration for clear eyes.
  消除黑眼圈、晦暗,创造明亮的眼眸.
  
• Erythema, edema and a purple discoloration of the eyelids are of dermatomyositis.
  眼睑红斑 、 水肿、淡紫色是皮肌炎的特征.
  
• This blue discoloration is caused by congested veins and looks like smudged mascara.
  来自BBC
• The pigs may also have red or purple areas of discoloration on the skin.
  来自BBC
• Their stems were brown and lumpy, but the discoloration had nothing to do with pollution.
  来自NEWYORKER