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

Use a sun block that filters UVA effectively.

使用能有效滤掉紫外线的防晒霜。

《牛津词典》

After that, avoid midday sun, have children wear protective clothing and hats; seek shade; use sunglasses that block UVA and UVB; and use sunscreen.

之后，远离中午的阳光，让孩子穿防护衣和戴帽子，找荫凉地避暑，使用太阳镜阻止紫外线并且涂抹防晒霜。

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'