Around the earth, there's a special kind of oxygen call " ozone" (O3).

地球周围有一种很特别的，名为“臭”（O3）。

Microbes living in oxygen-poor livestock dung produce methane, a potent greenhouse gas.

一些微生物生活在含量低的牲畜粪便中，它们产生甲烷，一种主要的温室气体。

The oxygen-carrying capacity of the blood goes up.

血液的携能力上升。

With the increased levels of oxygen, humans would have an increased chance of oxygen toxicity.

随着气增多，人类中毒的可能性也在增高。

Smoke is nothing more than a mixture of hydrogen, carbon, and oxygen.

烟雾是氢、碳的混合物。

This is due to myoglobin, an Iron and Oxygen binding protein found in muscle tissue.

这是由于肌红蛋白，一种在肌肉组织中发现的铁结合的蛋白。

It didn’t help as much as he expected—his blood-oxygen saturation levels got no better.

但这并没有像预想的那样有所帮助，他的血度并没有改善。

It contains oxygen and hydrogen that mixes together to form a very explosive combustion, two million pounds of thrust, that gets it off the pad and deeper into space than ever before.

它利用由氢组成的混合物产生爆炸性燃烧，由此产生了磅的推动力，使得它从发射台上起飞而深入之前无人踏足过的太空。

Take the Great Oxygenation Event of 2.3 billion years ago: evidence from ancient rocks tells us that levels of atmospheric oxygen spiked around this time, poisoning the oxygen-hating microbes that had dominated Earth for well over a billion years.

看看 23 亿年前的大化事件：古代岩石纪录显示，大气层中气含量在此时飙高，毒死了厌的微生物，它们已经称霸地球超过十亿年。

Other researchers have also found some superacids that bond really well with nitrogen oxides, gases made of both nitrogen and oxygen that are released in car exhaust, become smog, and lead to acid rain.

另一些研究人员还发现一些超强酸与氮化物结合的很好，汽车排放的含氮组成的尾气会造成光化学烟雾污染，进一步形成酸雨。

Due to her low metabolism, a panda mother has a relatively low blood oxygen level, so the cub can get more oxygen outside the womb.

由于新陈代谢较低，熊猫妈妈的血水平相对较低，所以熊猫宝宝可以在子宫外获得更多的气。

It helped patients with two inherited blood diseases — beta-thalassemia, where low levels of an oxygen-carrying protein called hemoglobin lead to weakness and exhaustion, and sickle cell disease, caused by a defective form of the same protein.

它帮助了种遗传性血液病的患者——地中海贫血症镰状细胞病，前者是一种叫做血红蛋白的携蛋白含量低，导致虚弱疲惫，后者是由同一蛋白的缺陷形式引起的。

And so if we were to look at two molecules that have the same atoms, oxygen and hydrogen, but they have them in a different ratio, then we're going to get a different ratio of their average masses.

因此, 如果我们观察具有相同原子(氢)的个分子, 但它们的原子比例不同, 那么我们就会得到不同的平均质量比例。

But all the other rocks we knew from elsewhere in the solar system which are meteorites that fall out of space, all have different oxygen isotope ratios.

但是我们掌握的来自太阳系其它地方的所有石块，那些从太空落下的陨石，都具有不同的同位素的比率。

The reactors use " tristructural isotropic particle fuel" , in which blobs of fissile uranium (along with oxygen and carbon) are wrapped in layers of carbon and silicon carbide.

反应堆使用了“三结构各向同性颗粒燃料”，其可裂变铀（以及碳）的斑点被包裹在碳碳化硅层中。

" … where I came across an old study from the 1960s which showed that a particular fungus in hedgehogs is able to produce a penicillin-like antibiotic that is very similar to methicillin."

“在那里，我偶然发现了上世纪60年代一份旧研究，显示刺猬体内有种特殊真菌能产生与甲西林非常相似的类似青霉素的抗生素。”

Then here's how to calculate it, I replied. In one hour each man consumes the oxygen contained in 100 liters of air, hence during twenty-four hours the oxygen contained in 2,400 liters.

下面就是对于这问题的算法，我回答，每个人每小时消费一升·空气中含有的，二十四小时就消费二千四升含有的。

Things like nitrogen, carbon, and oxygen move from nonliving parts of the environment — air, for example — to living things like plants and animals, and then back again to the environment.

像氮、碳这样的物质从环境的非生物部分——比如空气——转移到植物动物等生物身上，然后再回到环境中。

The researchers could tell that seeds had been deposited higher up the mountain than they had been harvested by the ratio of their oxygen isotopes, which changes with altitude.

通过研究同位素的比例，研究人员发现随着海拔的变化，种子所在地区的海拔会升高。

It's a nice middle ground that lowers the oxygen in our blood by only about 4%, which is not enough to really affect how we function.

在这个绝妙的中间气压水平值下，血液中的含量只降低了4%，这不足以影响身体的机能。