氧
1、一种非金属元素,原子序数8,主要是两价,一般是无色无嗅无味不可燃的双原子气体,稍溶于水,是地球上含量最丰富的元素之一,以游离状态存在于空气中,按体积计,空气含氧达21%,并以化合状态存在于水、大多数普通岩石、矿物(例如氧化物、硅酸盐、碳酸盐),以及多种多样的有机化合物(例如醇、酸、脂肪、碳水化合物、蛋白质) ——元素符号O。
吸烟和喝酒妨碍身体对氧的吸收能力。
Smoking and drinking interfere with your body's ability to process oxygen.
中风可导致大脑供氧中断。
A stroke can disrupt the supply of oxygen to the brain.
水分子由两个氢原子和一个氧原子构成。
A molecule of water consists of two atoms of hydrogen and one atom of oxygen.
增氧健身操能加快心跳,并有助于消耗脂肪。
Aerobic exercise gets the heart pumping and helps you to burn fat.
大脑需要持续的供氧。
The brain requires a constant supply of oxygen.
氧的反应性很高。
Oxygen has high reactivity.
水是含有氢元素和氧元素的化合物。
Water is a compound containing the elements of hydrogen and oxygen.
水是含有氢元素和氧元素的化合物。
Water is a compound containing the elements hydrogen and oxygen.
它也可以按照组成部分被分解——氧和氢。
It could also be broken down into its component parts—oxygen and hydrogen.
当硫化氢与水中的氧反应,得到的就是硫酸。
When hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid.
水可分解为氢和氧。
Water can be resolved [decomposed] into hydrogen and oxygen.
第三种是某些基本的化学物质,如碳、氧和氮。
A third is certain basic chemicals such as carbon, oxygen and nitrogen.
水含有氢和氧。
Water contains hydrogen and oxygen.
因此,脊椎动物的无氧能量储备与动物的大小成正比。
Thus the anaerobic energy reserves of a vertebrate are proportional to the size of the animal.
有机物可能会进行部分分解,并耗尽沉积物中的溶解氧。
The organic matter may partially decompose, using up the dissolved oxygen in the sediment.
然后这些装置将氢和氧合成水,并在这个过程中释放电力。
These devices then combine hydrogen and oxygen to make water and liberate electricity in the process.
无氧运动是一种爆发型运动,运动完后需要休息一段时间。
Anaerobic exercise is a powerful burst of movement followed by a period of rest.
科学家们认为在大气层下存在着一层由碳和氧组成的稀薄地壳。
Under the atmosphere, scientists think there is a very thin crust of carbon and oxygen.
笑会造成心脏和血液循环功能的短期变化,增加心率和耗氧量。
Laughter produces short-term changes in the function of the heart and blood circulation, increasing heart rate and oxygen consumption.
通过测量一束头发上较重的氢和氧同位素的比例,科学家可以构建一个地理时间轴。
By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline.
由于铝总是和其他元素结合在一起,最常见的是和氧结合,所以在自然界中找不到游离的铝。
Nowhere in nature is aluminum found free, owing to its always being combined with other elements, most commonly with oxygen.
由于铝总是和其他元素结合在一起,最常见的是和氧结合,所以在自然界中找不到游离的铝。
Nowhere in nature is aluminum found free, owing to its always being combined with other elements, most commonly with oxygen.
要是他们没找到橡皮糖,在支架里的两个人,等他们的氧供应用完了,便在轨道里窒息而死了。
If they had failed to find the gumdrop, the two men in spider would have been stranded in the orbit to die when their oxygen supply ran out.
这篇文章提出的脊椎动物的无氧能量储备总量与脊椎动物的体型成正比,是基于以下哪些假设?
The passage's suggestion that the total anaerobic energy reserves of a vertebrate are proportional to the vertebrate's size is based on which of the following assumption?
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。
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.
主要的差别是,相比于太阳,阿连德陨石缺失了大部分的挥发性元素,例如氢、碳、氧、氮和稀有气体。
The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun.
能以无氧方式产生的能量是存在的糖原量的功能——在所有脊椎动物中,糖原量约占其肌肉湿重的0.5%。
The amount of energy that can be produced anaerobically is a function of the amount of glycogen present—in all vertebrates about 0.5 percent of their muscles' wet weight.
石英是石英——由四个氧离子围绕的硅离子——200万年前的更新世石英和5亿年前的寒武纪石英之间没有任何区别。
Quartz is quartz—a silicon ion surrounded by four oxygen ions—there's no difference at all between two-million-year-old Pleistocene quartz and Cambrian quartz created over 500 million years ago.
两个氢原子和一个氧原子结合组成一个水分子。
Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
过去给水族馆的水过滤和充氧的尝试都已失败了。
Previous attempts at filtering and oxygenating aquarium water had failed.