Several chemicals have displaced the oxygen.
有几种化学物质取代了氧气。
Something in addition to the iron on Earth's surface must have absorbed much of the oxygen produced by plant life.
除了地球表面的铁以外，一定有什么东西吸收了植物产生的大量氧气。
Almost all the oxygen in water is oxygen 16, but a few molecules out of every thousand incorporate the heavier isotope 18.
水中几乎所有的氧都是氧16，但每一千个分子中就有几个含有较重的同位素18。
If you take the jaws of a powerful magnet and pour liquid oxygen in between the jaws, the oxygen will stop and will sit in the jaws.
如果你用一块具有较强磁力的颚型磁铁，然后把液氧倒在颚型磁铁的中间，氧气会停在颚型磁铁中。
The weakened fall leaf then becomes vulnerable to the highly destructive effects of the oxygen created by the excited chlorophyll molecules.
活跃的叶绿素分子产生的氧气破坏性强，秋天衰弱的树叶随后变得更容易受到影响。
As a way of reconciling these two facts, scientists have hypothesized that nearly all of the oxygen being produced was taken up by iron on Earth's surface.
为了调和这两个事实，科学家们假设，几乎所有产生的氧气都被地球表面的铁吸收了。
"It's a pity that they only give us the oxygen (氧气) we breathe," Joris said.
尤里斯说：“很遗憾，他们只提供给我们呼吸需要的氧气。”
While exercising, you breathe deeply and your body makes better use of the oxygen (氧气) exchange.
在运动时深呼吸，你的身体就能更好地利用氧气交换这个过程。
As soon as the oxygen is gone, decay stops and the remaining organic matter is preserved.
当氧气消耗殆尽分解便停止，留下剩余的有机物。
When hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid.
当硫化氢与水中的氧反应，得到的就是硫酸。
Other planets in our solar system lack the oxygen atmosphere that helps explain why life exists on Earth.
我们太阳系的其他行星缺乏氧气大气层，这有助于解释为什么地球上存在生命。
He displays fire fighters' equipment, including the oxygen mask, which he encourages his listeners to play with and put on.
他展示了消防员的装备，包括氧气面罩，还鼓励听众把玩并试戴氧气面罩。
The oxygen isotope ratio of the ocean changes as a great deal of water is withdrawn from it by evaporation and is precipitated as snow to form glacial ice.
随着大量的水通过蒸发被抽离，并以雪的形式沉淀形成冰川冰，海洋中氧同位素的比率就发生了变化。
We know that because the sulfur and the chlorine in the oxygen have different average valence electron energies, they'll have different electron affinities.
我们都知道，因为氧气中的硫和氯具有不同的平均价电子能，它们的电子亲和力也不同。
You might get just a little bit tired out after the first few thousand kilometers, especially with all the oxygen tanks you'll have to be hauling up with you.
在爬完刚开始几千公里后，你可能会觉得有点累，特别是你还要带一大堆氧气罐一起爬上去。
The modern atmosphere supports many forms of complex life that would not have been able to exist in Earth's first atmosphere because the oxygen level was too low.
现代大气层支持着许多复杂的生命形式，而这些生命在地球最初的大气层中是不可能存在的，因为当时的氧气含量太低。
A study on the oxygen consumption rate of chlorobenzene homologue under the condition of cosubstrate was conducted.
对共底物条件下氯苯同系物的耗氧率进行了研究。
The oxygen radicals theory should be the etiology of presbyacusis.
氧自由基学说应该是老年性聋的发病病因。
The only oddity was the oxygen tanks.
唯一奇怪的就是那些氧气罐。
Which of those two is more electronegative? The oxygen.
它们两个中哪个有更高的电负性？氧。
But, the oxygen has taken two electrons from the sulfur.
但是，氧从硫那里得到了2个电子。
The fire may consume most or all of the oxygen in the air.
火焰会消耗掉空气中大部分乃至所有氧气。
And the embryos bask in the oxygen given off by the algae.
胚胎也因为藻类产生的氧气而受益。
And, of course, there is the novelty value of the oxygen bar.
当然，有种新颖的氧吧创意。
The oxygen bubbles to the surface, leaving a proton behind.
氧气泡浮出水面，水中就留下了质子。
The microbes decompose the organic matter, using up the oxygen.
而微生物分解有机物需要氧气。
The oxygen of capital has now thinned dramatically for the newcomers.
所以那些有限的资本就被新进入者大大“稀释”了。
The nutrients feed algal blooms, which suck up the oxygen in the water.
这些营养养育了大量藻类，这些藻类吸收水中的氧气。
Initially the methane burns up all of the oxygen present to generate heat.
起初甲烷燃掉了所有的氧气并产生热量。
Initially the methane burns up all of the oxygen present to generate heat.
起初甲烷燃掉了所有的氧气并产生热量。
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