| 31. | The Moon is likely to become the industrial hub of the Solar System, supplying the rocket fuels fro its ships, easily obtainable from the lunar rocks in the from of liquid oxygen . |
| 月球很可能成为太阳系的工业中心。从月球上的岩石中很容易提炼出液态氧，作为航天飞船的燃料。
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| 32. | Mars is too dry and poor in oxygen , Venus far too hot, and so is Mercury, and the outer planets have temperatures near absolute zero and hydrogen-dominated atmospheres. |
| 火星太干燥又缺氧，金星太热，水星也一样。除此之外，太阳系的其他行星的温度都接近绝对零度，并围绕着以氢气为主的大气层。
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| 33. | Atom number eight is called oxygen . |
| 原子序数为8的物质叫做氧。
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| 34. | The oxygenator, which gives the blood the oxygen with the body needs, is also part of the heart-lung machine. |
| 心肺机中含有一部分叫供氧器，是往血液里送氧的，而氧是血液里所必需的。
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| 35. | Oxyliquits are explosives consisting of combustible materials impregnated with liquid oxygen . |
| 液氧炸药是将可燃物浸以液氧组成的。
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| 36. | Aluminum remained unknown until the nineteenth century, because nowhere in nature is it found free, owing to its always being combined with other elements, most commonly with oxygen , for which it has a strong affinity. |
| 铝总是跟其他元素结合在一起, 最普遍的是跟氧结合; 因为铝跟氧有很强的亲和力, 由于这个原因, 在自然界找不到游离状态的铝。所以, 铝直到19世纪才被人发现。
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| 37. | Chemical analysis of water yields hydrogen and oxygen . |
| 水经过化学分解会产生氢和氧。
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| 38. | Water can be reduced to oxygen and hydrogen by electrolysis. |
| 用电解法可以把水分解为氧和氢。
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| 39. | The asthmatic patient was given a shot of oxygen . |
| 气喘病人接了一次氧气。
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| 40. | not enough oxygen to sustain life |
| 氧气稀少不足以维持生命
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