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

90%以上黑色素瘤是由过度暴露于紫外线所引起。

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。

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

它通过吸收太阳两种紫外线来保护每一个生物。

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

这只是意味着你角膜暴露在更多紫外线下，比它们习惯要多。

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病变引起，有些癌症则是由紫外线、烟草烟雾或化学物质引起。

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

在上方平流中，臭氧使得有害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.

在大气高处，紫外线将氧气转化为臭氧，为地球提供了一个至关重要屏障——臭氧。

We get melanoma mainly by exposure to ultraviolet radiation.

我们主要通过暴露于紫外线而患上黑色素瘤。

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，臭氧恢复有望减少太阳有害紫外线对人类，避免因此导致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，笼罩在强烈紫外线之中，没有在水中移动那种相对轻松浮力。

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

来自太阳光紫外线提供了分解导致烟雾形成分子所需能量。

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紫外线光谱范围内。

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

那是因为紫外线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.

但是防晒霜中纳米粒子通过阻止紫外线进入人体来保护皮肤免受阳光照。

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，阳光中紫外线会破坏皮肤细胞中 DNA，从而杀死它们。

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，也是我们接收到紫外线主要来源，它有相较可见光更短波长 也带有更多能量。

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.

这种颜色来自于冥王星大气中碳氢化合物被紫外线照后雨滴落到地表时形成称为“tholins”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.

因为它在强烈热带阳光下度过了很长时间，---草鼠还进化出两种独立防护措施来抵御太阳紫外线。

One theory that seems to fit the facts concerns the consumption of the ozone layer, a well-documented phenomenon which has led to a sharp increase in ultraviolet radiation levels.

一个似乎与事实相符理论涉及臭氧消耗，这种导致紫外线量大幅增加现象早已得到证明。