Those who took supplements or were exposed to more sunlight, which helps the body grow its own vitamin D, had children with greater bone densities.
孕妇若摄取补充锭，或较常暴露于可助身体产生维他命D的阳光下，则小孩骨质密度较高。
Vitamin D3 is available through diet, supplements and exposure of the skin to sunlight, or ultraviolet B (UV .
维生素D3可以通过饮食，额外补充及将皮肤暴露在阳光或者紫外线B（UV）下获得。
Vitamin D is naturally present in few foods, such as salmon and herring , so humans need to get it either from sunlight or dietary supplements.
只有三文鱼和鲱鱼等少数几种食品天然就含有较多的维生素D，所以人们需要从阳光或者膳食补充剂中获得这种维生素。
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