Introdue the impact on the human body of the sunshine briefly , UVA or VUB ray to damage that skin bring mainly among them and the sun ˉ proof principle of the sun ˉ proof agents .
简单介绍了日照对人体的影响；其中主要介绍了UVA、VUB射线对肌肤带来的损伤；防晒剂的防晒原理。
vub