discoloration

名词 C2

中文：变色

The act of discoloring, or the state of being discolored; an alteration of hue or appearance. (countable, uncountable)
A discolored spot; a stain. (countable, uncountable)

复数 discolorations

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There can be no doubt that it is a blood mark.” He was pointing to faint discolorations along the woodwork of the window.

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