此外，有些纬度的地方全年很多时间日照不足，无法通过人体皮肤产生足够多的维生素D。

The IOM assumed that most people are getting minimal sun exposure , given rising concern over skin cancer and latitudes where the sun is too weak to create vitamin D on the skin much of the year.

youdao

此外，有些纬度的地方全年很多时间日照不足，无法通过人体皮肤产生足够多的维生素D。

The IOM assumed that most people are getting minimal sun exposure , given rising concern over skin cancer and latitudes where the sun is too weak to create vitamin D on the skin much of the year.

youdao