discolour的现在完成时怎么写？

discolour的第三人称单数（三单）为：discolours...

discolour的现在进行时为：discolouring...

A tooth which has been hit hard may discolour.受过重击的牙齿可能会变色。A tooth which has been hit hard may discolour...受过重击的牙齿可能会变色。Benzoyl peroxide can cause fabric to discolour on contact. Use with care.过氧化苯可能导致织物脱色, 请小心使用.Plastic...

discolour的音标：discolour的英式发音音标为：[dɪs'kʌlə(r)]discolour的美式发音音标为：[dɪs'kʌlər]...

A tooth which has been hit hard may discolour.受过重击的牙齿可能会变色。Plastic tends to discolour with age.塑料久而久之便会退色。Benzoyl peroxide can cause fabric to discolour on contact. Use with care.过氧化苯可能导致织物脱色, 请小心使用....

vt.使变色，使褪色vi.变化，变色，褪色n.变色，褪色，污染...

discolour的一般过去时为：discoloured...