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。
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。
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