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Published on
January 8, 2026ZH only
防晒霜的防晒原理和选购逻辑：物理、化学、混合，买对比买贵更重要
Skincare Personal Care Skincare Science
每年夏天防晒选购话题都是热点，但很多人买了几十年防晒，还不清楚为什么防晒霜能防晒、SPF 和 PA 代表什么、为什么同样"SPF50+"有的涂上很厚重有的很清爽。这篇文章把底层逻辑说清楚。
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