For the most part, wrinkle lines are due to sun exposure and age.

在大多数情况下，皱纹是由于日晒和年龄造成的。

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But for the most part, wrinkle lines are due to sun exposure and age.

但皱眉产生的主要原因还是因为在阳光下的暴露和年龄。

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Another prediction made by the desensitisation hypothesis is that individual tolerance should increase with exposure, and therefore with age.

脱敏假设还带来了另一项预测，即个人耐受性会随着暴露次数(与年龄正相关)的增加而增加。

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So while cosmic rays might ensure you get cancer and die before reaching 90 years of age, increasing exposure from other sources lowers the age with each exposure.

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Children and young adults were not included in the study, critics note, despite other findings that exposure beginning at a younger age is associated with increased risk of brain tumors, Morgan said.

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In addition, vitamin D can be produced by the skin with sunlight exposure, but this ability decreases with age and varies considerably by geography, time of day or year, skin melanin content (darker skin produces less vitamin D) and sunscreen use.

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