资料来源 : pyDict

变色;污点

资料来源 : WordNet®

discolouration
     n 1: a soiled or discolored appearance; "the wine left a dark
          stain" [syn: {stain}, {discoloration}]
     2: the act of changing the natural color of something by making
        it duller or dingier or unnatural or faded [syn: {discoloration}]