It's very destructive, but it also catalyzes the production of vitamin D in the skin, vitamin D being a molecule that we very much need for our strong bones, the health of our immune system, and myriad other important functions in our bodies.
它充满了破坏性， 不过与此同时，它也催化着皮肤内维生素D的生产。 维生素D是我们非常需要的一种元素， 帮助我们强壮骨骼，增强免疫系统， 以及其他体内非常重要的各种作用。