氧存在于空气中。
Oxygen is present in the bloodstream.
氧气存在于血管中。
They are produced in the body when too much oxygen is present.
他们在身体中存在过多的氧气的时候产生。
Fire, typically defined as the rapid molecular acquisition of oxygen, happens only when sufficient oxygen is present and is not important in such high-energy, low-oxygen environments such as stars.
一般的火焰是物质和氧分子剧烈结合的反应，只有在具有相当氧浓度的环境才会发生，所以在恒星这种高能量但低氧的环境中，火焰并不存在。
It is mostly made of ionized hydrogen and helium, though carbon, oxygen, nitrogen and other atoms are present, producing the complex color blend visible here.
它主要由电离氢分子和氦构成，同时还包括碳、氧、氮和其他原子，使得其呈现纷繁的混合色彩。
One way of dealing with them is to dry them and then heat them with little or no oxygen present.
一个处理方法是将它们在没有氧气或者氧气稀薄的情况下烘干。
SF6 is safe if there is adequate oxygen present in inhaled air.
当吸入的空气中含有充足的氧气时，SF6是对人体无害的。
A small amount is present as myoglobin, which ACTS as an oxygen store in muscle tissue.
少量存在的肌红蛋白，它作为一个氧气储存在肌肉组织。
The use of jet stirring fermenter is a new approach to increase the rate of oxygen transferring with decrease the energy consumption, based on the present situation of our country.
射流搅拌发酵罐是在结合我国实际的基础上提出的一条既能有效利用压缩空气的能量以达到增强氧传递速率又能降低能耗的新途径。
This can cause a fire if an ignition source is present. Although oxygen is not flammable it will support and vigorously accelerate the combustion of other materials.
如果存在火源，这会导致起火。尽管氧本身是不可燃的，它能支持和大大加速其它材料的燃烧。
"Cash, though, is to a business as oxygen is to an individual: never thought about when it is present, the only thing in mind when it is absent, " Buffett said.
对此巴菲特表示：“现金对于企业来说，就像氧气对于一个人的作用。 有它的时候感受不到它的存在，没它的时候就想起来了。
Although oxygen does not participate directly in the citric acid cycle, the cycle operates only when O2 is. present.
尽管氧气没有直接参与三羧酸循环，循环却只有在氧气存在时才能进行。
Oxygen is usually present as a depolarizing agent.
氧常作为去极化剂存在。
The present paper introduces the process route of superior quality structural carbon steel SAE1008. Control oxygen and inclusion content in steel, is the key of product quality guarantee.
本文介绍了优质碳素结构钢sae1008的生产工艺。指出控制钢水中全氧含量和夹杂物含量，是生产顺行和产品质量保证的关键。
Oxygen, the most abundant chemical element, is present in combination with hydrogen to the extent of 89 percent in water.
在水中，氧这种最丰富的化学元素与氢结合，其含量多达89%。
There is insufficient evidence at present on which to recommend a policy of using room air over 100% oxygen, or vice versa, for newborn resuscitation.
婴儿出生时使用空气与氧气复苏的比较 通常推荐100％氧气用作婴儿出生时复苏的气体。
Abstract: the oxygen concentration method is the most effective and most commonly used method in dividing spontaneous combustion "three zone" in low-gas goaf in engineering practice at present.
摘要用氧气体积分数法划分低瓦斯采空区自燃“三带”是目前在工程实践中应用最为广泛，也是最有效的方法。
The present invention relates to the fresh-keeping storage, transportation and marketing of aquatic product and is one oxygen inflating packing bag made of separating film material.
本发明涉及水产品的保活鲜贮运和销售，是一种高阻隔或次高阻隔薄膜材料制成的充氧活鲜水产包装袋。
The present invention relates to chemical and environment protection technology, and is especially gradient magnetic field process and apparatus for raising content of oxygen dissolved in water.
本发明公开了属于化工环保技术领域的一种通过梯度磁场提高水中溶解氧含量的方法及装置。
The present invention relates to chemical and environment protection technology, and is especially gradient magnetic field process and apparatus for raising content of oxygen dissolved in water.
本发明公开了属于化工环保技术领域的一种通过梯度磁场提高水中溶解氧含量的方法及装置。
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