Plastic tends to discolour with age.

塑料久而久之便会退色。

牛津词典

The pipes were beginning to rust, discolouring the water.

管子开始生锈，水都变颜色了。

牛津词典

A tooth which has been hit hard may discolour...

受过重击的牙齿可能会变色。

柯林斯高阶英语词典

Some oil had seeped out, discolouring the grass.

有些油渗出来了，把草地染得变了颜色。

柯林斯高阶英语词典

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.

期刊摘选

Plastic tends to discolour with age.

塑料久而久之便会退色。

《牛津高阶英汉双解词典》

A tooth which has been hit hard may discolour.

受过重击的牙齿可能会变色。

柯林斯例句