More than 90 percent of melanomas are caused by too much ultraviolet radiation.

90%以上的黑色素瘤是由过度暴露于紫外线辐射所引起的。

The atmosphere is so thin, there is very little protection from ultraviolet radiation.

由于大气稀薄无法阻挡紫外线的辐射。

It protects every living thing by absorbing two types of ultraviolet radiation from the Sun.

它通过吸收太阳的两种紫外线辐射来保护每一个生物。

It just means that your corneas are exposed to more ultraviolet radiation, then they're accustomed to.

这只是意味着你的角膜暴露在更多的紫外线辐射下，比它们习惯的要多。

Some arise because of problems within a person's cells; others are caused by ultraviolet radiation, tobacco smoke, or chemicals.

有些癌症是人体细胞内的病变引起的，有些癌症则是由紫外线、烟草烟雾或化学物质引起的。

High up in what is called the stratosphere, the ozone layer keeps harmful ultraviolet radiation from reaching the earth.

在上方的平流层中，臭氧层使得有害的紫外线不能进入地球。

High up in the atmosphere, ultraviolet radiation transformed oxygen into ozone and gave Earth a vital shield — the ozone layer.

在大气层的高处，紫外线辐射将氧气转化为臭氧，为地球提供了一个至关重要的屏障——臭氧层。

We get melanoma mainly by exposure to ultraviolet radiation.

我们主要通过暴露于紫外线辐射而患上黑色素瘤。

Sunproof clothing has prevention and control of ultraviolet radiation exposure.

防晒服具有预防和控制紫外线照射的作用。

The recovery of the ozone layer is expected to reduce the sun's harmful ultraviolet radiation to humans, preventing skin cancer and cataracts.

分析认为，臭氧层的恢复有望减少太阳有害紫外线对人类的辐射，避免因此导致的皮肤癌和白内障等疾病。