A second important area is monitoring the size of the hole in the ozone layer above Antarctica, since this is an indicator of global ultra-violet radiation levels.

第二个重要的地方是检查南极洲上臭氧层洞的大小，因为它标志着全球紫外线的辐射水平。

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

它们是由于紫外线对乙烷的作用形成的，你看。

Both of these ingredients are used to help protect people from the sun's ultraviolet rays but some scientists believe that when they wash off people's skin, they're harmful to marine ecosystems like coral reefs.

这两种成分都被用来保护人们免受太阳紫外线的伤害，但是一些科学家认为，当它们洗掉人们的皮肤时，对海洋生态系统如珊瑚礁是有害的。

While this camera isn't a perfect measure of UV protection, it'll be able to show whether I get an even application or not.

虽然这款相机检测紫外线防护的性能并不完美，但它可以示我的防晒是否涂抹均匀了。

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的紫外线波。

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

太阳的紫外线和热量共同对水产生影响。

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线的灼伤。

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线的伤害。

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

主要对绿光敏感的细胞，主要对紫外线敏感的细胞。

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

它使用一种叫做UVC的紫外线进行消毒。

Because the UV rays from the sun can damage your eyes.

因为太阳的紫外线会损伤你的眼睛。

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。

A Lucky Lawn company, specializing in spray painting dried-out lawns, claims the paint is actually good for the grass because it protects the blades from harmful ultra-violet rays.

专门从事将干草坪刷色的幸运草坪公司声称这种油漆对草坪特别好，因为它能保护叶片免受有害的紫外线照射。

And think about if you're someone who has a history of a melanoma, if you use an SPF 30, you're blocking out let's say 98% of the harmful rays.

想想看如果你是有黑色素瘤病史的人，如果你用的是防晒系数30的防晒霜，假设有98%的紫外线可以防护掉。

That's well into the stratosphere, the portion of the atmosphere that contains the ozone layer, which protects Earth from harmful ultraviolet rays, says study co-author Kane Stone, an atmospheric chemist at the Massachusetts Institute of Technology (MIT) in Cambridge.

该部分大气层被称为平流层，包含臭氧层，它保护地球免受有害的紫外线辐射，麻省理工学院（MIT）的大气化学家、该研究合著者Kane Stone表示。

And just to look at the sheer numbers globally, they're just much larger pool of options that manufacturers can draw from, which helps the consumer because they're just more products out there, they're protecting a wider range of UV light.

仅从全球数目繁杂的品类来看，紫外线防晒剂是制造商可以提取的大部分选择，这对消费者有益，因为它们可以有更多的产品，它们保护着更大范围的紫外线。

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。

For 2 billion years, all organisms on Earth are unicellular, and they likely lived in the oceans, shielded from the hard ultraviolet light of the sun but then something remarkable happened, Photosynthesis.

20亿年以来，地球上的所有生物都是单细胞的，它们很可能生活在海洋，不受太阳紫外线的照射，但随后发生了一件非同寻常的事情，就是光合作用的产生。

It would involve the use of gigantic hoses or high-powered chemical cannons to spray chemicals into the stratosphere to act as a reflective barrier against sunlight and harmful UV rays.

该技术需要用到巨型水管或是一种高性能的化学加农炮向平流层喷洒化学物质以起到反射屏障的作用阻隔阳光和有害的紫外线。

But these results do not suggest that people should stop using sunscreen to protect against the sun's harmful ultraviolet (UV) rays, researchers said.

但研究人员称，这些结果并不意味着人们应该停止使用防晒霜来抵御太阳有害的紫外线。