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You could run the reaction, take solid iron gaseous oxygen, form iron oxide, measure the heat of formation of it, tabulate it.
你可以进行一个反应,用固态铁和氧气生成氧化铁，测量它的生成热，列成表格。
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If we take hydrogen peroxide in the liquid state, it can break down to form water and oxygen.
如果我们有一些液态的过氧化氢，它会分解成水和氧气。
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That is metallic sodium that would keep in kerosene so it doesn't react with the oxygen in the air.
金属钠应该保存在没有中,这样它就不会和空气中的氧气反应了。
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You regulate your breathing rate in order to accomplish that and we'll talk about this in a couple of weeks.
人们调节呼吸的频率来获得足量的氧气,我们过几周会讲到这方面内容
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Because of the lack of oxygen getting to the cells, the cells are no longer able to carry on their various metabolic processes.
由于细胞中缺少氧气,所以细胞不能完成,它们的各种新陈代谢活动
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And, in fact, 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.
实际上，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。
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Well, if you get the combustion chamber hot enough, in point of fact, there are some reactions between nitrogen and the oxygen.
如果燃烧室的温度足够高的话，实际上在氮气和氧气之间,会发生一些反应。
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You burn methane, and it combines with oxygen to form water, to form CO2.
燃烧酒精，酒精分子和氧气结合形成水和二氧化碳。
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The respiratory system plays an important role in maintaining our internal environment at the proper level of oxygen, by bringing the right amount in.
呼吸系统的重要性在于,通过向体内输入适量的氧气,维持人体内环境中的氧平衡
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All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?
所有的这些都是来自于第一主族和第二组主族,到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？
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I mean, if the energy is lower to occupy a smaller volume, then if I have this room and a bunch of molecules of oxygen, and nitrogen and what have you in the air, and there are weak attractions between them, why don't they all just sort of glum together and find whatever volume they like.
我的意思是，如果占据小的体积会使能量降低，如果我有这样一个空间,和一些氧气，氮气和其他空气中有的气体，并且分子之间还有微弱的相互作用，为什么他们不黏在一起,然后占据他们所想要占据的体积。
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Hemoglobin, as you know, is an oxygen carrier and so red blood cells concentrate in bags of hemoglobin which circulate in your blood and they carry oxygen.
众所周知,血红蛋白可以携带氧气,含有大量血红蛋白的红细胞,在全身循环,以携带氧气
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This is exactly where I don't really know the details, but I take it it's something like: because of whatever the original input was, eventually the blood's no longer circulating and oxygen isn't making its way around the body.
事实上我对这方面不是很了解,我只能认为是,不论最初的死亡原因是什么,最后血液不再流动,氧气不能输送到全身
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So, if we're going to go to the moon, we're going to go to Mars,we want to be able to produce oxygen, structural metals and photovoltaic materials from in situ resources.
如果我们要去月球上，我们要去火星上，我们则必须要制造,氧气，结构金属和光电材料,就在原地制造。
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We, in fact, borrow oxygen or steal oxygen from the air free of charge.
我们事实上免费从空气中,借或者偷氧气。
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But, as you know, air is only 20% oxygen, the balance being nitrogen.
但是你知道空气中只有20%的是氧气，大部分的是氮气。
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It occurs because blood flow gets reduced in that blood vessel and so the heart muscle, which is actively beating all the time, needs large quantities of oxygen provided by blood can't get the blood through the vessel.
发病原因是冠状动脉血流量降低,因为心肌搏动永不停歇,随时需要血液供给大量氧气,发病时血液无法正常流过血管
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The cardiovascular system, which is the heart and the blood vessels which are responsible for and the blood and so this is responsible for moving blood around the body and the blood brings oxygen and nutrients to every part of the body, you know that.
心血管系统,包括心脏和血管,主要负责输送血液,即心血管系统负责将血液送至全身,血液会带着氧气和营养物质,到身体的每一个部分,你懂的
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The main goal of the respiratory system is to bring fresh in so that you can extract oxygen from it, and blow used air out so that you can rid of carbon dioxide which is the end product of carbon metabolism inside our bodies.
呼吸系统的主要功能是,吸入新鲜空气,以便获得空气中的氧气,呼出废气,以便排出二氧化碳,二氧化碳是人体内碳代谢的终产物
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Cl 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S和,在氧气中,具有不同的平均价电子能，所以他们的电子亲和力也不同。
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