Doctors also think that uvb rays play a role in the development of melanoma .
专家们同时也认为uvb射线对于黑色素的形成发展起着一定的作用。
Both uva and uvb rays can cause long-term skin damage and can contribute to skin cancer .
长波紫外线和短波紫外线都会导致长期的皮肤破坏,有可能引发皮肤癌变。
Sunscreens do block the uvb radiation that causes sunburn , and more recent formulas also block the uva radiation that causes wrinkles and aging .
防晒霜可以阻止导致晒伤的短波紫外线,更新的一些配方还可以阻止导致皱纹和老化的长波紫外线。
Even when the sun is not shining brightly , uva and uvb rays can still harm your skin and cause sunburn .
即使阳光不强的时候,长波和短波紫外线仍能伤害你的皮肤造成晒伤。
Uvb light isn 't the only danger in the sun 's rays . Uva light from the sun can penetrate windows and even light clothes , causing cumulative sun damage that shows up as wrinkles and other signs of aging .