The "sunshine vitamin" is synthesized in our skin when we are exposed to direct sunlight, but sunblock impedes this process.

维他命d这种“阳光维他命”是我们晒太阳时，在皮肤中合成的一种物质，但防晒霜会阻碍这一过程的发生。

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Vitamin D, the so-called sunshine vitamin because it’s made when sunlight gets your skin.

维生素D，它是当阳光晒到皮肤时生成的，所以叫做阳光维生素。

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That great dome of ice reflects sunlight back into space throughout the 24 hours a day of polar summer sunshine.

在极昼时期，巨大的冰穹24小时不停地将阳光反射回太空。

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Low levels of the "sunshine vitamin" -- so nicknamed because we get most of our vitamin D from sunlight -- may increase the risk of cardiovascular disease, according to a report published Monday in the Journal of the American College of Cardiology.

CNN: Vitamin D may be essential for heart health