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

90%以上的黑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。

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，避免致的皮肤癌和白内障等疾病。

Land was a formidable environment: hot, dry, bathed in intense ultraviolet radiation, lacking the buoyancy that makes movement in water comparatively effortless.

炎热、干燥，笼罩在强烈的紫外线辐射之中，没有在水中移动的那种相对轻松的浮力。

The ultraviolet radiation from sunlight provides the energy necessary to breakdown molecules that contribute to smog formation.

来自太阳光的紫外线辐射提供了分解致烟雾形成的分子所需的能量。

In 2007, samples of tardigrades were exposed to a space vacuum and two different ultraviolet radiation spectral ranges.

2007 年，缓步动物样本暴露在太空真空和两种不同的紫外线辐射光谱范围内。

Thats because ultraviolet radiation bombards the whole earth year-round, even now when the northern hemisphere is all chilly and cloudy.

那是为紫外线辐射全年都在轰击整个地球，即使现在北半球寒冷多云。

But the nanoparticles in sun cream protect the skin against the sun by blocking the ultraviolet radiation from entering the body.

但是防晒霜中的纳米粒子通过阻止紫外线辐射进入人体来保护皮肤免受阳光照射。

Sunlight is composed of electromagnetic waves and is our primary source of ultraviolet radiation, which has a shorter wavelength than visible light and carries more energy.

太阳光是由电磁波组成的，也是我们接收到的紫外线的主要来源，它有相较可见光更短的波长 也带有更多的能量。

Not to mention, things like ultraviolet radiation in sunlight, which can damage to DNA in skin cells, which can kill them off.

更不用说，阳光中的紫外线会破坏皮肤细胞中的 DNA，从而杀死它们。

That color comes from compounds called " tholins" formed when hydrocarbons in Pluto's atmosphere are zapped with ultraviolet radiation and then rain down onto the surface.

这种颜来自于冥王星大气中的碳氢化合物被紫外线辐射照射后雨滴落到地表时形成的称为“tholins”的化合物。

Because it spends a lot of time in the intense tropical sun, --- the grass mouse has also evolved two separate safeguards against the Sun's ultraviolet radiation.

为它在强烈的热带阳光下度过了很长时间，---草鼠还进化出两种独立的防护措施来抵御太阳的紫外线辐射。

It could, for instance, amplify chemical reactions that break down ozone molecules, slowing the recovery of the ozone layer and allowing more cancer-causing ultraviolet radiation to reach the ground.

例如，它可以放大分解臭氧分子的化学反应，减缓臭氧层的恢复， 并使更多致癌的紫外线辐射到达地面。