名词
中文翻译：烟酸
同义词：
['nicotinic acid', 'nicotinamide']
例句：
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1.Niacin is an essential nutrient for maintaining good health.
烟酸是维持健康所必需的营养物质。
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2. The supplement contains niacin to help with digestion.
这种补充剂含有烟酸，有助于消化。
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3. He was diagnosed with a deficiency in niacin, which led to his condition.
他被诊断出缺乏烟酸，这是导致他状况的原因。