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来源:雅诚德英语网
Vitamin C, also called ascorbic acid, is an antioxidant that promotes healthy teeth and gums.
维他命C,也叫抗坏血酸,是一种抗氧化剂,可以促进牙齿和牙龈的健康。
Vitamin C, also called ascorbic acid, is an antioxidant that promotes healthy teeth and gums.
维他命C,也叫抗坏血酸,是一种抗氧化剂,可以促进牙齿和牙龈的健康。