Ultraviolet rays are divided into three types: "UVA", "UVB" and "UVC". Among them, UVA and UVB can reach the ground, while UVC is absorbed by the ozone layer and cannot reach.
Ultraviolet rays are divided into three types: "UVA", "UVB" and "UVC". Among them, UVA and UVB can reach the ground, while UVC is absorbed by the ozone layer and cannot reach.
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