至于任何一种维生素或补品，服用前请咨询你的医生。
As with any vitamin or supplement, please consult your doctor before taking.
直到1911年才发现了第一种维生素。
It was not until 1911 that the first of the vitamins was identified.
我不明白，可是为什么可以大量服用一种维生素，但却不能服用另一种呢？
I don't understand, though, why it's okay to take lots of one vitamin, but not another.
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