名词
中文翻译：烟酸
同义词：
['niacin', 'nicotinamide']
例句：
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1.Nicotinic acid is an essential nutrient for the body.
烟酸是人体必需的营养素。
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2. The supplement contains high levels of nicotinic acid.
这种补充剂含有高浓度的烟酸。
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3.He took a vitamin supplement to boost his energy levels.
他服用了维生素补充剂来提高他的精力水平。