名词中文翻译
中文翻译：黑色褪色
同义词：
['black spotting', 'black stain']
例句：
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1.The old painting has developed a black discolouration over time.
这幅旧画随着时间的推移出现了黑色斑点。
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2. The dark fabric absorbed the sun's rays and turned into a black discolouration.
深色布料吸收了阳光，变成了黑色的斑点。
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3. The antique vase had a black discolouration on one side that was hard to remove.
这个古董花瓶的一面有一块难以去除的黑色斑点。