名词
中文翻译：褪色
同义词：
['discoloration', 'fading', 'tinge']
例句：
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1. The old painting has started todiscolour over time.
这幅旧画随着时间的推移开始褪色。
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2. The clothes have started to discolour after being washed.
这些衣服在洗过之后开始褪色。
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3. The sun'srays are causing the leaves to discolour.
太阳的光线使树叶变色。