discolouration

• 名词，指某物变色、褪色或失去原有颜色的过程或结果，通常使其变得暗淡、发黄或肮脏。

A noun referring to the process or result of something becoming stained, faded, or changed from its natural color, often making it appear duller or dingier.

1. Stained or altered appearanceB2formal

   A visible mark or area where the original color has been changed, often making it look dirty or less attractive.

   变色

   • The old photograph showed a yellow discolouration around the edges.
   • The white shirt had a noticeable discolouration after the bleach spill.
   • The dentist noted a slight discolouration on the patient's front tooth.

   同义词blemishblotblotchmarksmudgespotstaintarnish

2. Process of color changeB2formal

   The action or process of making something's natural color become duller, dingier, or unnatural.

   变色

   • Prolonged exposure to sunlight can cause discolouration of fabrics.
   • The chemical reaction led to the discolouration of the metal surface.
   • Improper cleaning methods can result in the discolouration of wooden furniture.

   同义词fadingstaining