discolour例句

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.

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