体型更大的生物生存的关键因素是氧气，氧含量的变化史也刻在了埃迪·卡拉岩石群上。
A key requirement for larger creatures is oxygen, and the dramatic history of oxygen levels is also etched in Ediacaran rocks.
它增加了代谢效率，调节了神经递质和大脑氧含量，大脑使用了身体20%的氧气。
It increases metabolism efficiency, regulates neurotransmitters, and boosts oxygen levels in the brain which USES 20% of the body's oxygen.
当潮汐退却时，需要氧气的微生物，我们物为好氧菌可以呼吸繁殖。
When the tide is out, bacteria that use oxygen, called aerobic bacteria, can breathe and flourish.
最大氧耗量就像机动车的能量输出功率，就是肌肉吸收氧气继续工作的最高速度。
The VO2max is like the power output of a motor, Rapoport said. It's the maximum rate at which the muscles can take up oxygen to keep working.
对于哺乳动物，每次吸气都将富氧空气带进肺中被称为肺泡的“死胡同”。这些在肺泡中循环的空气通过与肺毛细血管的血液进行气体交换，输进氧气并带走血液中的二氧化碳。
Air circulating through these sacs transfers oxygen into the bloodstream that picks up the blood's carbon dioxide waste.
头盔内有氧气循环流动，除了供氧，还可以防止面罩雾化。
Oxygen is circulated around the helmet to stop the visor misting.
高压氧舱也是一种选择，高剂量的氧气可以起些效果。
There's the hyperbaric chamber; a concentrated dose of oxygen might help.
原因：富氧血是明红色，然而，含较少氧气的血变成黑色和蓝色调。
The cause: Oxygen-rich blood is bright red, while blood with less oxygen turns dark and bluish-colored.
虽然大脑代谢与血氧动力学的关系还没有完全理解，但可以认为运送更多的氧气需要更多的血流量。
More oxygen requires more blood flow, although the connection between cerebral metabolism and hemodynamics is not fully understood yet.
提升脑部的血液循环，更新大脑的微血管状态，使其能更有效地携带氧气，满足大脑的工作用氧。
Boosts blood circulation in your brain by zeroing in on your brain's tiny blood vessels so they can deliver oxygen more efficiently. It even helps your brain use oxygen better.
氧气是双原子分子，即每个氧分子由两个氧原子构成。
The kind that we breathe is made of diatomic molecules, which means each molecule has two atoms.
多数菌种喜欢微氧生长环境（含3-10％的氧气）。
Most species prefer a micro-aerobic atmosphere (containing 3-10% oxygen) for growth.
这个多出来的氧原子致使臭氧的性质与它的氧气亲戚截然不同——臭氧有毒，且稳定性更高。
This extra atom makes ozone behave differently than typical oxygen. Ozone is both poisonous and protective.
更重要的是，空气在肺里只能流向一个方向，那就意味着它里面的氧气含量比人类肺里氧含量高。
What’s more, air only goes through the lungs in one direction, which means it has a higher oxygen content than the air in human
在实验室的研究中，科学家频繁的测量输送和利用的氧气，称之为最大携氧量，也就是VO2max。
In their laboratory research, scientists frequently measure this delivery and use of oxygen, calling it maximum oxygen uptake or VO2 Max.
头盔内有氧气循环流动，除了供氧，还可以防止面罩雾化。
L Oxygen is circulated around the helmet to stop the visor misting.
但问题是它远在250000英里之外，不能与地球通讯的地方，并且你一定要不停地更换氧气瓶保证供氧！
The problem is that it's 250, 000 miles away, out of communication with Earth, and you definitely need non-stop oxygen bottles!
但问题是它远在250000英里之外，不能与地球通讯的地方，并且你一定要不停地更换氧气瓶保证供氧！
The problem is that it's 250,000 miles away, out of communication with Earth, and you definitely need non-stop oxygen bottles!
这也是大脑的利益所在——大脑是身体里最大的耗氧器官，并且如果氧气短缺，大脑也是首先受害的器官。
This is certainly in the brain's interests-it's the body's biggest user of oxygen and the first organ to suffer if there's a shortage.
而光合作用中分解出的氧粒子，最终形成了氧气，作为“加工废料”，随着水分的蒸散通过气孔排放出去。
The main waste product, oxygen, they emit through their stomata in a watery belch.
一对氧原子在催化剂上结合使其成为氧气分子。
The catalyst then knits pairs of oxygens together to make O2.
新项目将帮助玩家在水下对溺水像空气作为战利品，氧的药水和氧气的爱好者。
New items will help the player underwater against drowning like air as loot, oxygen potions and oxygen buffs.
向氧性：一种刺激方向为氧气的向性运动。
Aerotropism a tropism in which the orientating stimulus is oxygen.
呼吸作用能够为细菌提供更大的能量，但这个过程需要氧，而内脏里氧气稀薄，因此大多数细菌都是利用发酵作用来分解上述物质的。
But it requires oxygen, which is sparse in the gut. So most bacteria go the fermentation route.
更重要的是，空气在肺里只能流向一个方向，那就意味着它里面的氧气含量比人类肺里氧含量高。
What's more, air only goes through the lungs in one direction, which means it has a higher oxygen content than the air in human lungs.
真菌是好氧微生物，这就是说他们的生长需要氧气。
Fungi are aerobic microorganisms, that is, they need oxygen for their growth.
假如我们的心脏很强健并且能够高效地工作，氧气就会在身体里循环流动，有助于身体组织的供氧和更新。
If our heart is strong and working efficiently, oxygen will circulate all round the body helping to feed and renew our body tissues.
氧气的消耗会产生能够破坏生物的氧自由基。
Oxygen use produces oxygen-free radicals that can destroy an organism.
氧气的消耗会产生能够破坏生物的氧自由基。
Oxygen use produces oxygen-free radicals that can destroy an organism.
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