Use a broad-spectrum sunscreen of sun protection factor 15 +.

使用防晒指数15 +的广谱防晒霜。

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The beach can be a great way to cool down in summer, but be careful not to get sun-burnt by using a sun cream with a sun Protection factor of at least 15 (SPF 15 +).

夏天去沙滩是很好的避暑方式，但要小心不要被太阳晒伤，使用防晒指数最少为15的防晒霜。

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She said that the use of sun creams and moisturisers with a sun protection factor also reduces UV absorption and so vitamin D production.

她说，使用含有防晒因子的防晒霜和保湿露也能减少紫外线的吸收和维生素D的合成。

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They weren't cancerous, but she began using a sun-protection factor of 45 as part of her daily routine.

WSJ: The Myths of Daily Sunscreen

Look for sunglasses with an eye-sun protection factor (E-SPF) between 25 and 50, he said.

WSJ: The Crucial Years for Protecting Your Eye Health