查词历史：
- discolour
vt.
vi.
n.
- 过去式： discoloured
- 过去分词： discoloured
- 现在分词： discolouring
- 第三人称单数： discolours
in AM, use 美国英语用 discolor
1.
V-ERG
(使)变色;(使)褪色 If something discolours or if it is discoloured by something else, its original colour changes, so that it looks unattractive.
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A tooth which has been hit hard may discolour...
受过重击的牙齿可能会变色。
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Some oil had seeped out, discolouring the grass.
有些油渗出来了，把草地染得变了颜色。
discoloured
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Some of the prints were badly discoloured.
有些图片褪色严重。
discoloration
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...the discoloration of the soil from acid spills.
酸性物质溢出引起的土壤变色
