直接涂防晒霜可以吗 夏日指南：不知道这2点，涂多少防晒都白搭

夏日指南：不知道这2点，涂多少防晒都白搭  

Sun Protection is essential to skin cancer prevention – about 90 percent of non-melanoma skin cancers and about 86 percent of melanomas are associated with exposure to UV radiation from the sun.
防晒对预防皮肤癌非常重要。大约90%非黑素瘤、86%黑素瘤皮肤癌患者都与紫外线辐射息息相关。
Ultraviolet A (UVA) is the longer wave UV ray that causes lasting skin damage
skin aging
and can cause skin cancer.
UVA波段相对较长，能够对皮肤造成伤害、老化甚至是引起皮肤癌。
Ultraviolet B (UVB) is the shorter wave UV ray that causes sunburns
skin damage.
UVA波段相对较短，会造成晒伤、皮肤损伤。
SPF is a measure of a sunscreen's ability to prevent UVB from damaging the skin.
防晒系数，是指防晒霜防止户外紫外线对皮肤造成损伤的能力。
If it takes 20 minutes for your unprotected skin to start turning red
using an SPF 15 sunscreen theoretically prevents reddening 15 times longer – about five hours.
如果你不做任何保护措施，阳光下，20分钟，你的皮肤才会晒红。那么，理论上来说，SPF15的防晒霜能够延长15倍长的时间，大约5个小时。
This chemical-free sunscreen protects your skin from UVA (these cause aging)/UVB (these cause you to burn) rays with zinc oxide.
面部防晒霜成分天然、无化学添加剂，使用氧化锌（物理防晒）来抵御紫外线。
Unlike sunscreens of the past that would be promised during contact with water
water triggers the protection in this product to bee even stronger.
不像过去的防晒霜一遇到水，效果就会大大降低，资生堂的这款防晒霜遇水防晒效果则更为强大。
This oil-free
nonedogenic formula contains perlite and silica that can soak up 250 percent of their weight in sweat and oil.
这款防晒霜的配方无油、不易引发粉刺和黑头。同时包含珍珠岩、二氧化硅等成分能够有效的去除皮肤中的油分。
Its clear
non-greasy finish makes this the perfect first step in your daily glam routine.
清爽、不油腻的Coola妆前乳会是你迷人妆容的第一步。
If you have sensitive skin
you need a sunscreen that’s free of fragrance
dyes
and oils
just like this mineral one from Neutrogena.
如果你是敏感性肌肤，你需要一支没有香味、不油腻，就像露得清这样的防晒霜。