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....
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...