当皮肤暴露在阳光下，紫外线辐射会引发游离原子团的形成，转而破坏皮肤细胞中的DNA， 引起肿瘤的生长。
When the skin is exposed to sunlight, the radiation triggers the formation of free radicals which, in turn, damages the DNA in skin cells, causing tumours to grow.
当皮肤暴露在阳光下，紫外线辐射会引发游离原子团的形成，转而破坏皮肤细胞中的DNA， 引起肿瘤的生长。
When the skin is exposed to sunlight, the radiation triggers the formation of free radicals which, in turn, damages the DNA in skin cells, causing tumours to grow.
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