而处在大气上层的臭氧就吸收有害的紫外线光。
Ozone gas in the upper atmosphere absorbs harmful ultraviolet light.
根据光稳定剂作用机理的不同，将光稳定剂分为光屏蔽剂、紫外线吸收剂、激发态猝灭剂及自由基捕获剂。
Based on different action principle, light stabilizers were defined as ultraviolet light screening agent, ultraviolet absorbent, quencher and free radical catching agent.
首先，其实人体并不能从日光中吸收维生素，而是特定波长的光(中波紫外线，UVB)可以激活皮肤内一种叫做7 -脱氢胆固醇的化学物。
First of all, the vitamin is not actually absorbed from the sunlight, but rather is made by the body when certain wavelengths of light activate a chemical called 7-dehydrocholesterol within the skin.
应用推荐