过多地暴露于紫外线是一个危险因素。
过多的太阳紫外线照射可能导致皮肤癌。
Too much exposure to the sun's ultraviolet rays can cause skin cancer.
被紫外线过多照射可以损害皮肤细胞的DNA。
她解释说晒黑是皮肤的一种防御反应，皮肤为了保护自己免受过多的有害的紫外线的照射产生更多的黑色素。
A suntan, she explained, was a defensive skin reaction to produce more of the pigment melanin to protect itself from too much harmful ultraviolet (UV) radiation.
让自己暴露在合适日光下有好处，可是过多暴露在紫外线(UV)下会让你产生灼伤、皱纹、皮肤癌等令人不愉快的东西。
While exposing yourself to the right amount of sunlight can be beneficial, overexposure to ultraviolet (UV) rays can lead you nasty things like sunburn, wrinkles, skin cancer and some other problems.
让自己暴露在合适日光下有好处，可是过多暴露在紫外线(UV)下会让你产生灼伤、皱纹、皮肤癌等令人不愉快的东西。
While exposing yourself to the right amount of sunlight can be beneficial, overexposure to ultraviolet (UV) rays can lead you nasty things like sunburn, wrinkles, skin cancer and some other problems.
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