维生素d—你的皮肤把日光转化成维生素d，但是很多人有太阳恐惧症。

Vitamin D — your skin converts sun into vitamin D, but a lot of people have this sun phobia.

youdao

维生素d—你的皮肤把日光转化成维生素d，但是很多人有太阳恐惧症。

Vitamin D — your skin converts sun into vitamin D, but a lot of people have this sun phobia.

youdao