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

由稀薄无法阻挡紫外的辐射。

However, that comes with the need to protect ourselves against those UV rays.

然而，这是为了保护我们自己免受紫外的伤害。

Both of these ingredients are used to help protect people from the sun's ultraviolet rays.

这两种成分被用来帮助保护人们免受太阳紫外的灼伤。

The reindeer is also one of the only mammals on the planet that can see ultraviolet light.

驯鹿还是为数不多的能看到紫外的哺乳动物之一。

Cells sensitive mainly to green light and cells sensitive mainly to ultraviolet light.

主要对绿光敏感的细胞，主要对紫外敏感的细胞。

The ultraviolet rays and the heat from the sun act together on the water.

太阳的紫外和热量共同对水产生影响。

It is disinfecting using a form of ultraviolet light called UVC.

它使用一种叫做UVC的紫外进行消毒。

It's dark green because they have this particular pigment protecting them from the access of UV light.

这是深绿色的, 因为它们有这个特殊的色素保护自己不受紫外的侵害。

Gas molecules emitted by the comet get ionized by the Sun's ultraviolet light.

彗星释放的体分子被太阳的紫外电离。

The white crust of the soda lake reflects the sun's glare and increases the impact of its ultraviolet rays.

湖的白色层反射着太阳的光芒，增强了紫外的杀伤力。

They're formed when ultraviolet light interacts with ethane you see.

它们是由紫外对乙烷的作用形成的，你看。

The type and amount of melanin in your skin determines whether you'll be more or less protected from the sun.

那么我们的祖先是如何应对量的紫外照射的呢？

This divergence, known as the ultraviolet catastrophe, hinted at a deep-seated flaw in classical physics.

这种被称为紫外灾难的分歧暗示了经典物理学中的一个根深蒂固的缺陷。

They make a variety of compounds called flavonoids that absorb UV.

它们会产生一种吸收紫外的黄酮类物质。

But exposure to UV radiation could prematurely age your hands and even potentially boost your risk of skin cancer.

但紫外的辐射会使你的手提前老化甚至还有可能增加你患皮肤癌的风险。

We have an -- The robot uses waves of ultraviolet light called UVC.

我们有——这种机器人，使用的是叫做UVC的紫外波。

SPF is a nonlinear scale of how much UVB radiation is needed to give protected skin a sunburn.

SPF是一种非性的比例，关的是造成晒伤的b波紫外的量。

For comparison, Europe requires that all of its more than 20 active ingredients protect against both.

相比之下，欧洲的规定中，有20种有效成分是可以同时防护这两种紫外的。

But it’s terrible at reflecting UV rays.

但它反射紫外的能力很差。

All forms of UV light are known to be harmful to the skin and to the eyes.

众所周知，所有形式的紫外都对皮肤和眼睛有害。