夏天,一些人以为自己脸上涂上了太阳油或防晒霜,就不必担心皮肤晒黑了,于是就肆无忌惮地在阳光下暴晒,但那料到,他们的皮肤还是晒黑了。这些同志不解日晒的含义。所谓日晒,一是晒成黝黑、古铜色或小麦色;一是晒伤,即晒得发红甚至起泡,这两种反应分别是由太阳紫外线的长波和短波所引起的。紫外线的长波可致肌肤变 In the summer, some people think that their face is coated with sun oil or sunscreen, so they do not have to worry about tanning their skin, so they brazenly expose themselves to the sun, but only to find that their skin is still tanned. These comrades do not understand the meaning of sun. The so-called sun, the first sun tan, bronze or wheat color; one is sunburn, that is, red or even blistering sun, the two reactions are caused by the sun’s long-wave UV and shortwave. Long-wave ultraviolet light can cause skin changes