discoloration

n.

变色，褪色，污染；

1. She notices a discoloration around his hairline.
   她注意到他的发际线有一块疹斑。

THE BIOCHEMICAL BASIS FOR DISCOLORATION IN FRESH MEAT: A REVIEW
Discoloration and mineralization of Reactive Red HE-3B by heterogeneous photo-Fenton reaction.
Tooth discoloration of immature permanent incisor associated with triple antibiotic therapy: a case report.
Discoloration and detoxicification of a Congo red dye solution by means of ozone treatment for a possible water reuse
Relationship between hardness, discoloration, and microbial invasion in carious dentin.
Discoloration and Mineralization of Orange II Using Different Heterogeneous Catalysts Containing Fe:  A Comparative Study
Biochemical and physical factors affecting discoloration characteristics of 19 bovine muscles.
Control of Minimally Processed Carrot (Daucus carota) Surface Discoloration Caused by Abrasion Peeling
Essential constituent and method of use for maintaining hair coloration or reversing hair discoloration
Novel Bentonite Clay-Based Fe−Nanocomposite as a Heterogeneous Catalyst for Photo-Fenton Discoloration and Mineralization of Orange...