These are prime hours for exposure to skin-damaging ultraviolet (UV) radiation from the sun, even on overcast days.
这段时间是皮肤受到太阳紫外线照射伤害的主要时段，即使是阴天也是如此。
This, in turn, will lower the depth and turbidity of water in mountain streams, increasing the amount of damaging ultraviolet light that reaches the stream beds.
这反过来又会降低山区溪流的深度和浑浊度，增加紫外线到达河床造成的损害。
They explained that grapes and grape derivatives have a compound - a flavonoid - that helps protect human skin from the damaging effects of ultraviolet radiation.
他们解释，葡萄和葡萄的衍生产品中含有一种黄酮化合物的组合，它能够保护人类皮肤免受紫外线的伤害。
应用推荐