Sun-soaking season is here, and that means if you don't lather up with sunscreen, you could be doing serious damage to your skin cells' DNA, setting yourself up to develop a potentially deadly form of cancer.

烈日炎炎的季节到了，这意味着如果你不涂防晒霜，就可能会严重损害你的皮肤细胞的遗传物质（DNA），而且还可能会使你自己患上致命的癌症。

Melanoma kills more than 10,000 Americans every year, according to the Skin Cancer Foundation.

皮肤癌基金会指出，每年有10000多名美国人死于黑色素瘤。

Those deadly cancer cases are typically caused by UV radiation you get from either baking in the sunshine, or lounging in a tanning bed.

那些致命癌症通常是因你曝晒于阳光下或躺在（利用太阳灯照晒棕褐色皮肤的）浴床上接受到的紫外线辐射而造成的。

So it's important to lather up with some protective sunscreen if you're going to be spending time in the sun - especially during warmer summer months, when the UV Index rises and the sun becomes more potent .

所以如果你要在阳光下度过时光，特别是在更暖和的夏日，紫外线指数上升且阳光更烈的时候，涂点防晒霜是非常重要的。

We enlisted the help of two skin experts to explain just how long sunscreen lasts and how to re-apply it correctly. Here's their best advice:

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