【揽瓜阁5.0】Day9 2021.02.16【自然科学-化学、天文、生物】

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How to separate oxygen from air using magnets: if it works, this vital gas should become cheaper

阅读时间:5’36
总结时间: 29’57
总时间: 35’

文章中心大意
Oxygen is useful and the need of it is large beyond expectation. Other than the traditional ways to get it, there is a new alternative method, called magnetic separation. This approach implemented by Dr Vetrovec is expected to be cost less than earlier attempt. However, though the author concedes that it still remains unknown whether this approach will cost less and achieve a certain success, the idea itself is appealing.

每段段落大意
1，Oxygen is useful and the demand of it is large.
2, The world market for oxygen could be larger for it is required in some processes. Thus, America’s department of Energy is sponsoring a project intended to pull oxygen from the atmosphere with magnets
3, Traditional ways to get oxygen
4, The principle of magnetic separation to get oxygen
5, The previous attempt is costly while what Dr Vetrovec intends to do would be accessible
6, This part elaborates on how Dr Vetrovec uses his methods to get oxygen
7, Though whether the magnetic separation will cost less or get more oxygen still remains unknown, the author argues that the idea of the approach is appealing.

印象深刻的句子
Various estimates put it as having been between about $28bn and $49bn in 2019

生词
Metaphorically:比喻的
Sequester：隔绝
Liquefaction:液化作用
Blower: a device that blows air
Save fossil fuels’ bacon解决 化石燃料的危机
Bacon: 解救。。于困境

Mercury has a molten core, radar reveals
阅读时间:2’42
总结时间: 18’33
总时间: 22’

文章中心大意
Mercury is at least partially molten, the finding is of great significance-> Two traditional views in terms of the issue=> the new finding shows that Mercury is not solid throughout , ending the long-standing debate=> The scientists provided explanations that why Mercury remains molten

每段段落大意
1，The argument of the passage: recent study shows that Mercury is at least partially molten. And the finding is of great significance
2,  View 1（the earliest opinion） : considering Mercury’s small size, Mercury is solid
3, View 2: However, the earliest view is challenged by the later observation. The finding that Mercury has a magnetic field indicates that Mercury has a liquid core. But it also exits other possibilities.
4, View3: The latest finding shows that Mercury is at least partially molten. And the possible explanations for how Mercury formed.

印象深刻的句子
The finding settles a long-simmering debate about the least studied of the planets. It may also provide insight about how the solar system created its planets.
生词
Mercury: 1，水银 2，水星（本文）
Molten: 融化的
Simmering: if a conflict or a quarrel simmers, it does not actually happen for a period of time, but eventually builds up to the point where it does.(酝酿，即将爆发)
Sloshing: 晃荡的
Remnant 残存物

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两篇精读

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Sapphirevivi

Day 9

ttttz

第1篇：
阅读 5'45"  总结  10'

中心大意
当前工业对氧气的需求量很大，文章重点介绍了通过磁场提取纯氧的方法，这一方法具有发展前景。

分论点
1~2 氧气不论对人体还是工业生产都很重要，当前氧气的需求量巨大。
3 介绍氧气的获取方式：空气中含有氧气，通过大工厂蒸馏分离成分；通过固氧植物获得纯度稍低的氧气；JV还提出了用磁铁分离出氧气
4.磁场提取纯氧的原理：空气通过磁场时，氧气能够集中在场强的位置，分离氧气集中和氧气低的部分并重复这一过程，可以获得足够纯的氧气
5.之前有工程师尝试了电磁方法，但存在一些缺陷。V改进这一方法，减少了能源消耗
6~7 磁场中 Aqwest进行气体分离的原理。通过不断重复分离的过程，氧气可以达到90%的纯度
8.这一方法的可行性仍待考察，但确实具有发展前景。

生词
Magnet n. 磁铁；[电磁] 磁体；磁石
Porous adj. 多孔渗水的；能渗透的；有气孔的

第2篇：
阅读 3'43"  总结 15'

中心大意
一项新的研究表明，水星内核中有液体

分论点
1.一项新的雷达研究表明，水星的内核中至少有一部分是液体
2.根据水星自身的位置和直径，天文学家计算出它应该很久以前就凝固了
3.1974年，M10飞船发现水星有磁场，反驳了前面的观点
4 P30年前提出，通过研究水星的旋转可以得出其内核是否有液体
5.经过6年的数据记录，M和P发现水星内核中有液体。科学家们指出水星和其他行星从其他地方获取硫，降低了熔点，使其内核中含有液体

生词
Mercury 水星，水银
Infiltrate vt. 使潜入；使渗入，使浸润
Remnant n. 剩余 adj. 剩余的
Configuration n. 配置；结构；外形