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.
将SPF系数乘以10得出来的时间是你在涂防晒产品的情况下的保护时间。
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.
将SPF系数乘以10得出来的时间是你在涂防晒产品的情况下的保护时间。
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