評論
打印
SPF stands for Sun Protection Factor. To figure out how long you are safe from the sun (at least the UVB rays) you need to do a little math. Take the number of SPF and multiply it by 10. That is the time that if you were under perfect conditions, you'd be safe from the sun's rays.
SPF是防曬系數(shù)的意思。需要通過一定的計(jì)算才能知道你在太陽下可以待多久而不被曬傷(至少不被UVB射線曬傷)。將SPF系數(shù)乘以10得出來的時(shí)間是你在涂防曬產(chǎn)品的情況下的保護(hù)時(shí)間。
For example: SPF 20 x 10 = 200 minutes of sun protection
例如：SPF20的防曬產(chǎn)品可以可保護(hù)你達(dá)200分鐘之久。
Perfect conditions mean that you aren't in water or sweating, two things that usually go hand in hand with the sun. This also doesn't reflect sunscreen that can rub off from your clothing.
理想的條件意味著你不是在水里或出汗。而這兩個(gè)事情通常和陽光密切聯(lián)系在一起。但這也并不反應(yīng)防曬霜會(huì)被你的衣服所擦掉。
Because you want to be safe from the sun, I'd recommend applying every 1-2 hours, no matter the SPF.
因?yàn)槟阆敕罆瘢晕彝扑]不管防曬系數(shù)是多少，每隔兩個(gè)小時(shí)涂一次。
