What percentage of Earth's oxygen is produced by the Amazon rainforest?

由亚马逊雨林产生氧占全球氧量比重是多少呢？

The primary method of generating breathable oxygen onboard the ISS revolves around oxygen generators.

在国际空间站上产生可呼吸氧主要方法围绕着氧发生器。

Every other breath we take is thanks to oxygen produced by the ocean.

每隔一次呼吸所吸入氧都来自于海洋产生氧。

By extracting and utilizing the water, astronauts can generate oxygen for breathing, produce rocket propellant, and even sustain agriculture without soil through a technique called hydroponics.

通过提取和利用水，宇航员可以产生供呼吸氧，生产火箭推进剂，甚至通过一种叫做水培法技术来维持农业。

The more that we get rid of our natural green spaces, the less we're able to have that oxygen naturally generated in our environment.

越是放弃自然绿色空间，环境中自然产生氧就越少。

Well, the oxygen that comes out of that process is a byproduct, or something that's made by the nature of the process, not on purpose.

这个过程中产生氧是副产品，或者说是这个过程自然产物，不是故意。

They generate half of the world's oxygen, regulate our climate, and provide food for more than three billion people.

它产生全球一半氧，调节候， 并为超过三十亿人提供食物。

Even today, organisms that don't use oxygen to make energy are almost all just single, microscopic cells.

即使在今天，不利用氧产生能量生物体几乎都是单一微观细胞。

It's the coal that provides the molecule, creating the reaction to get rid of the oxygen.

煤矿分子产生了去除氧反应。

They say forests, including the Amazon, absorb about the same amount of oxygen as they produce.

他认为森林（包括亚马逊）能够吸收它产生氧那么多。

So how do these oxygen generators produce breathable oxygen?

那么这些氧发生器是如何产生可呼吸氧呢？

Also, as trees age, they begin to absorb  less CO2 and produce less oxygen.

此外，随着树木龄增长，它开始吸收更少二氧化碳并产生更少氧。

Currently, the ISS cannot pressurize generated  oxygen to support astronauts on spacewalks.

目前，国际空间站无法对产生氧进行加压以支持宇航员进行太空行走。

So how did eating the oxygen-making bacteria create more oxygen?

那么，吃掉那些产氧细菌是如何产生更多氧呢？

So phytoplankton get more light, photosynthesize more, and make more oxygen.

所以浮游植物得到更多光， 进行更多光合作用， 产生更多氧。

So we can look at the oxygen that's being produced in an aquatic environment.

因此，可以观察水生环境中产生氧。

If and when Earth-like planets are found, astrobiologists will look at the atmospheric chemistry for signs of life, such as the presence of elevated levels of oxygen produced by photosynthesizing lifeforms.

一旦发现类似地球行星，天体生物学家将会研究其大化学成分， 寻找生命迹象，例如由光合生物产生氧含量升高。

And in the past decade or so, scientists have discovered that giving patients 100 percent oxygen creates hordes of free radicals that can cause all kinds of tissue damage.

而在过去十左右，科学家发现给患者提供100%氧会产生大量自由基， 这些自由基可以造成各种组织损伤。

We need to strap on oxygen tanks now, because the microorganisms in the sea aren't pumping out enough oxygen for us to survive, and things are getting icy.

现在需要背上氧罐，因为海洋中微生物产生氧不足以让生存，而且情况正在变得冰冷。

It has a neutron in its nucleus as well as the hydrogen defining singleton, proton, Like ordinary hydrogen deuterium can react with oxygen to yield water known.

它原子核中有一个中子以及氢定义单子， 质子，像普通氢氘一样可以与氧反应产生已知水。