| 词汇 | oxygen |
| 释义 | oxygen noun[ U ] uk /ˈɒk.sɪ.dʒən/ us /ˈɑːk.sɪ.dʒən/(symbolO) B2 a chemical element that is a gas with no smell or colour. Oxygen forms a large part of the air on earth, and is needed by animals and plants to live.氧，氧气 Air is composed mainly of nitrogen and oxygen.空气主要由氮和氧构成。 Deep-sea divers carry cylinders of oxygen on their backs.深海潜水员背上背有氧气筒。 Mountain climbers use oxygen when they reach higher altitudes.到了海拔较高的地方，登山者就要使用氧气。 Plants are the main source of atmospheric oxygen.大气中的氧气主要是植物产生的。 The symbol for oxygen is O2. Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium sodium transition metal zinc Blood carries oxygen through the body. Broken bones, organ damage, shock, lack of oxygen, and extreme cold all reduce your chances of survival. Laughing is good for your brain and your heart because they need a lot of oxygen to work well. Space is almost a vacuum, with neither the pressure nor oxygen to support the human body. The oxygen problem was finally solved by the use of pressurized cabins, allowing balloons to rise higher and higher. The problems at such a high altitude are the cold, low air pressure, and lack of oxygen. Their roots are above the water and can “breathe” oxygen. To save oxygen and energy, stay calm. Water is made up of two chemicals, hydrogen and oxygen. oxygen | American Dictionaryoxygen noun[ U ] us/ˈɑk·sɪ·dʒən/ biology, chemistry a colorless gas, one of the chemical elements, that forms a large part of the air on earth and is needed to keep most living things alive and to create fire Examples of oxygenoxygen In each case, inversion of configuration was demonstrated using thio-substituted non-bridging phosphate oxygens. This effect allows oxygen to be released from the molecule at venous oxygen pressure. The results support a link between aerobic resistance and defective oxygen scavenging. Reproducibility of replicate analyses of standards was generally better than 0.1 for both carbon- and oxygen-isotope ratios. However, we have observed that some exposure to atmospheric molecular oxygen may have limited, if any, effect on viability of certain methanogens. Thus, it appears that at least a few species of methanogens can tolerate atmospheric oxygen for relatively extended periods of time. Increased subaerial volcanism and the rise of atmospheric oxygen 2.5 billion years ago. It involves administering pure oxygen to the patient at greater than atmospheric pressure. In the normal fetus, the tension of arterial oxygen would be higher in the ascending aorta than in the pulmonary arteries and descending aorta. Although hopanoid biosynthesis does not require oxygen, these lipids have never been isolated from strictly anaerobic bacteria. Five days later, following extubation, the saturations were 86-88% in 50% facial oxygen. If demand for oxygen still exceeds supply once these adaptations have occurred, the fetus must further reduce its oxygen consumption. The present study was undertaken to investigate the effects of inspired oxygen and positive end-expiratory pressure on arterial blood gases and systemic delivery of oxygen. He helped to design a useful drug to deliver oxygen to tumours and to damaged tissues. An improvement in uptake of peak level of oxygen was observed after intervention. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Collocations withoxygenoxygenThese are words often used in combination with oxygen. Click on a collocation to see more examples of it. amount of oxygen In addition, from (5.2), the total amountofoxygen being consumed by the cells also increases. atmospheric oxygen The silica 'fusion crust' from the associated sample holder exhibited a significant degree of isotopic exchange with atmosphericoxygen during re-entry1. bottled oxygen Fire risks from using either oxygen concentrators or bottled oxygen are relatively small. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. See all collocations with oxygen |
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