以上来源于: WordNet
N-COUNT SPF is used before a number to indicate the degree of protection from the sun's rays that is provided by a sunscreen or similar product. The higher a product's SPF, the more protection it provides. SPF is an abbreviation for "sun protection factor." 防日光系数 ; sun protection factor的缩写 [usu before num]
First, use a high-quality sunscreen of at least SPF 15 or higher.
第一，要使用防日光系数为15或以上的高质量防晒霜。
However, today there are some products on the market that have SPFs as high as 50.
然而，如今市场上有一些防晒霜产品的防日光系数高达50。
For everyday, at my dermatologist's recommendation, I wear a sunscreen of SPF 15 or 30 on my face and neck.
在我的皮肤科医生的建议下，我每天都会在脸上和脖子上涂上防晒系数为 15 或 30 的防晒霜。
Be sure to apply sunscreen, or just use your facial moisturizer with SPF, all the way down past your neck though your chest each morning.
一定要涂抹防晒霜，或者只使用含有 SPF 的面部保湿霜，每天早晨从你的脖子一直到你的胸部。
Does the best sunscreen also have the highest SPF?
最好的防晒霜应该有最高的SPF吗？
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