discoloration

释义

n. 变色, 污染

例句

Vitamin K is helpful in reducing discoloration and the appearance of capillaries.

维生素K能够帮助减少污点和外观毛细血管。

Officials had noticed that local trees seemed to be under attack, showing damage such as cracks, discoloration and tissue deterioration.

此前，当地官员注意到，当地的树木看起来就像是遭受了某种侵害，出现了龟裂、变色、组织恶化等病变。