名词
中文翻译：黑头粉刺同义词
同义词：
['acne nigricans', 'nevus nigricans']
例句：
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1. The dark spots on his face are caused by keratosis nigricans.
他脸上的暗斑是由黑头粉刺引起的。
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2. This condition is often associated with acne nigricans.
这种状况通常与黑头粉刺有关。
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3. The patient was treated for keratosis nigricans using a topical cream.
患者被用一种局部药膏治疗黑头粉刺。