A sunscreen with a protection factor of 30 allows you to stay in the sun without burning.
一种防护系数为30的防晒霜使你能够待在太阳底下而不被晒伤。
However, there are gaps in scientifi c knowledge about exactly how colour interacts with other factors to infl uence a fabric’s ability to block ultraviolet protection factor (UPF).
但是，关于颜色到底是怎样与其他因素作用来影响布料紫外线防护系数（UPF）的科学知识还存在一些缺口。
The paper provides easy-to-understand daily life indexes such as the ultraviolet ray index, morning exercise index, sun protection factor index, carwash and heat stroke indexes.
该报纸提供了一些诸如紫外线指数、晨练指数、防晒指数、洗车指数以及中暑指数等简单易懂的每日生活指数提示。
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。
However, there are gaps in scientific knowledge about exactly how colour interacts with other factors to influence a fabric's ability to block ultraviolet protection factor (UPF).
但是，关于颜色到底是怎样与其他因素作用来影响布料紫外线防护系数(UPF)的科学知识还存在一些缺口。
But what does the SPF rating really mean? SPF stands for Sun Protection Factor.
但是防晒指数等级到底指的是什么呢？SPF是防晒系数的意思。
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。
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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