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

由亚马逊雨林产生的氧气占全球氧气量的比重是多少？

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气的主要方法围绕着氧气发生器。

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

们每隔一次呼吸所吸入的氧气都来自于海洋产生的氧气。

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的氧气，生产火箭推进剂，甚至通过一种叫做水培法的技术来维持农业。

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.

们越是放弃自然的绿色空间，们环境中自然产生的氧气就越少。

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.

这个过程中产生的氧气是副产品，或者说是这个过程的自然产，不是故意的。

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

它们产生全球一半的氧气，调节们的气候， 并为超过三十亿人提供食。

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

即使在今天，不利用氧气产生能量的生乎都是单一的微观细胞。

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

煤矿的分子产生了去除氧气的反应。

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

他们认为森林（包括亚马逊）能够吸收它们产生的氧气那么多。

So how do these oxygen generators produce breathable oxygen?

那么这些氧气发生器是如何产生可呼吸的氧气的？

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

此外，随着树木年龄的增长，它们开始吸收更少的二氧化碳并产生更少的氧气。

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

目前，国际空间站无法对产生的氧气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气的？

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

所以浮游植得到更多的光， 进行更多的光合作用， 产生更多的氧气。

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

因此，们可以观察水生环境中产生的氧气。

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.

一旦发现类似地球的行星，天生家将会研究其大气化成分， 寻找生命迹象，例如由光合生产生的氧气含量升高。

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.

而在过去十年左右，家发现给患者提供100%的氧气会产生大量的自由基， 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.

们现在需要背上氧气罐，因为海洋中的微生产生的氧气不足以让们生存，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.

它的原子核中有一个中子以及氢定义单子， 质子，像普通的氢氘一样可以与氧气反应产生已知的水。