Results The radiant intensity of ultravioletBradiation was seasonal.
辐射强度与辐射粒子的能量、静质量、简并因子有关。
2
The body gets most of its vitamin D not from diet but from skin exposed to the ultravioletBradiation in sunlight.
身体获取的大部分维他命D不是从饮食而是靠皮肤曝露在阳光中的紫外线B射线取得的。
3
As skin pigmentation increases, so does the period of exposure to ultravioletBradiation from sunlight needed to synthesise adequate amounts of vitamin d.