What is the difference between physical versus chemical sunscreen?
物理和化学防晒霜有什么区别？
The difference between physical (also called mineral) and chemical sunscreens is how they work. Physical sunscreen uses inorganic chemicals that can reflect or scatter sunlight away from the skin, and chemical sunscreens use organic (carbon-based) chemicals to absorb UV rays so that skin doesn’t absorb it. Some people prefer chemical sunscreens because they are generally very lightweight and easy to blend, which makes them easy to reapply, for example. Other people prefer mineral sunscreens because they work very quickly once applied to skin and can work well with sensitive skin.
物理（也称为矿物质）和化学防晒霜之间的区别在于它们的作用原理。物理防晒霜使用能够将阳光从皮肤反射或散射出去的无机化学物质，而化学防晒剂使用有机（碳基）化学物质吸收紫外线，使皮肤不会吸收紫外线。 有些人更喜欢化学防晒霜，因为它们通常非常轻便，易于混合，这使得它们具有容易重新涂抹等优势。其他人更喜欢矿物防晒霜，因为它们一旦涂敷于皮肤后可以非常快速地起作用，并且可以很好地适用于敏感皮肤。