UV rays are invisible and can't be felt on the skin but can damage skin cells leading to sunburn and an increased risk of skin cancer.

紫外线是不可见的并且皮肤也感觉不到，但是它能损伤皮肤细胞而造成晒伤，患上皮肤癌的风险也会增加。

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The studies also showed semagacestat was associated with an increased risk of skin cancer.

该实验还表明，semagacestat药物可能会增大病人患皮肤癌的风险。

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The other found that having a sibling or parent with one of several different types of non-melanoma skin cancer increased risk as well.

另一项研究表明某人的母亲或者兄弟姐妹有皮肤癌的话，他患皮肤癌的风险也会增加。

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In addition, data showed semagacestat is associated with an increased risk of skin cancer compared with those who received placebo.

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Sunbed use has been linked to an increased risk of developing skin cancer.

BBC: Doctors warn against sunbed use