Vitamins are substances that you need in order to remain healthy, which are found in food or can be eaten in the form of pills. 维生素
noun [物质名词] 维生素，维他命；维生素片，维生素丸
Lack of vitamin D is another factor to consider. 缺乏维生素D是另一个需要考虑的因素。
- vitamin 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Episode 6 Thanksgiving ACT I vitamin 名词: 维生素
