Sunscreens that use metallic compounds, such as titanium oxide or zinc oxide, to block, rather than absorb ultraviolet light may be the most effective when spending time outdoors.

 
  • 户外活动时使用金属化合物,如二氧化钛或氧化锌,以阻止紫外线,而不是吸收紫外线可能是最有效的。
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