vit·a·min D
noun/ˌvɪtəmɪn ˈdiː/
/ˌvaɪtəmɪn ˈdiː/
[uncountable]- any one of a group of vitamins found in meat such as liver, fish oils and eggs that are essential for healthy bones and teeth. Vitamin D is also produced by the action of the sun on the skin.
肉类中发现的一组维生素中的任何一种，例如肝脏、鱼油和鸡蛋，对健康的骨骼和牙齿至关重要。维生素 D 也是通过阳光对皮肤的作用产生的。