This burning effect can be easily masked by the cool temperatures on the mountain, so be sure to use sun block liberally , and bring a hat and sunglasses.

这些射线很容易被山顶的凉爽温度所掩盖，因此，一定要使用防晒护肤霜，并携带帽子和太阳镜。

youdao

It's the vitamin associated with the sun that we absorb through our skin, and increasingly block out when we use sunblock, to avoid getting skin cancer.

VOA: standard.2010.05.28

They suggested that "differences in sun protective behaviours, eg greater use of sun block" could explain why the younger group of women showed no benefit from living in sunnier climes.

BBC: Sunshine may 'reduce arthritis risk'