水溶性分子

Scientists have come up with a revolutionary new use for wood. They have devised a way to make it transparent. This could totally change the way many things in our lives are used and made. See-through wood could one day replace glass and be used in w

发表于:2018-12-03 / 阅读(79) / 评论(0) 分类 英语科技新闻

THE PROPERTIES OF WATER Earth is an ocean planet. About three billion years ago, life on our planet began in the deep blue seas. Ninety-nine percent of the living space on earth is in the oceans. Marine life is incredibly rich and varied. There are

发表于:2018-12-04 / 阅读(89) / 评论(0) 分类 人教高中英语高二

These discoveries raised the stakes. Here was a planet similar to our own. Mars might not have cities or civilizations. But it could be home to other smaller life forms like microbes. Chris McKay is N

发表于:2018-12-07 / 阅读(131) / 评论(0) 分类 火星生命

This is the VOA Special English Agriculture Report. Scientists have discovered more details about how plants use water. Their findings could help to engineer plants that grow better and more effectively in conditions with higher levels of carbon diox

发表于:2019-01-02 / 阅读(69) / 评论(0) 分类 2010年慢速英语(一)月

pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con

发表于:2019-01-03 / 阅读(116) / 评论(0) 分类 医务英语

This is Scientific Americans 60-Second Science. Im Sophie Bushwick. Got a minute? The carbon molecule known as a buckyball, a member of the fullerene family, can act as a cage for a variety of other chemicals. And now researchers have used one to tra

发表于:2019-01-08 / 阅读(78) / 评论(0) 分类 Scientific American(八)月

The Properties Of Water Earth is an ocean planet.About three billion years ago,life on our planet began in the deep blue seas.Ninety-nine percent of the living space on earth is in the oceans.Marine life is incredibly rich and varied. There

发表于:2019-01-09 / 阅读(257) / 评论(0) 分类 高中英语听力人教版第二册

EXPLORATIONS - Making Soaps with a Story By Dana Demange / Broadcast: Tue, 13 Nov 2007 16:00:00 UTC VOICE ONE: I'm Steve Ember. VOICE TWO: And I'm Barbara Klein with EXPLORATIONS in VOA Special English. Have you ever wondered when washing your hands

发表于:2019-01-11 / 阅读(277) / 评论(0) 分类 VOA慢速英语2007年(十一)月

Gravitational Waves Detected, Einstein Is Right 引力波存在证明爱因斯坦是正确的 尽管花费了100年时间,最终科学家还是证明了爱因斯坦的理论是正确的,引力波确实存在 The waves were predicted as part of Ei

发表于:2019-01-12 / 阅读(83) / 评论(0) 分类 2016年VOA慢速英语(二)月

As liquid water, these molecules are engaged in a constant and random square dance that is called the hydrogen bonding network. 作为液态水,这些分子从事着恒定而随机的被称为氢键网络的方块舞。 Entropy favors keeping the s

发表于:2019-01-17 / 阅读(69) / 评论(0) 分类 TED演讲教育篇

Let's look first. The fresh water that we depend on begins its life in the oceans. As the sun's rays beat down on the surface of the sea, they heat the water molecules until some evaporate. It's the start of an extraordinary journey. Here with water

发表于:2019-01-22 / 阅读(73) / 评论(0) 分类 自然百科2010年

21 Life Goes On 第二十一章 生命在前进 It isn't easy to become a fossil. 要变成化石可不容易。 The fate of nearly all living organismsover 99.9 percent of themis to compost down to nothingness. 几乎所有的生物其中的99.9%以上

发表于:2019-02-17 / 阅读(94) / 评论(0) 分类 万物简史

We are rediscovering the enigmas(谜团) of the Moon and they're really in our own backyard Dr Jim Garvin, Nasa Goddard Space Flight Center Moon water has world in a twitter A surprising amount of water has been found to exist in the Moon's soil. Data

发表于:2019-02-18 / 阅读(98) / 评论(0) 分类 英语新闻

What's more, I've detected those falling and rising currents that make up the ocean's true breathing. 此外,我又注意过那些由上而下和由下而上的水流,形成真正的海洋呼吸作用。 I've seen a molecule of salt water heat up

发表于:2019-02-25 / 阅读(84) / 评论(0) 分类 《海底两万里》中英双语有声读物

The hydrogen atoms cling fiercely to their oxygen host, but also make casual bonds with other water molecules. 氢原子死死地抓住其主子氧原子不放,而且与别的水分子的黏合也很随便。 The nature of a water molecule means th

发表于:2019-02-25 / 阅读(100) / 评论(0) 分类 万物简史

Any water molecule that strays beyond the edge of the cloud is immediately zapped by the dry air beyond, allowing the cloud to keep its fine edge. 要是水分子越出该云边缘,外面干燥的空气马上会把它除掉,从而使积云的边缘

发表于:2019-02-25 / 阅读(104) / 评论(0) 分类 万物简史

The temperature six miles up can be -70 degrees Fahrenheit, and you would need, or at least very much appreciate, supplementary oxygen. 10公里高空的温度会降至零下57摄氏度,你需要补充氧气,至少很希望这么做。 After you

发表于:2019-02-25 / 阅读(78) / 评论(0) 分类 万物简史

The reason that Vibrio fischeri is doing that comes from the biology. 费氏弧菌的发光现象来自生物学上的原因。 So again, another plug for the animals in the ocean, Vibrio fischeri lives in this squid. 接下来,我们再来看一个海

发表于:2019-03-04 / 阅读(176) / 评论(0) 分类 TED演讲教育篇

What was actually interesting to us was not that the bacteria made light, but when the bacteria made light. 事实上,我们感兴趣的部分并不是细菌会不会发光,而是细菌何时发光。 What we noticed is when the bacteria were alo

发表于:2019-03-04 / 阅读(160) / 评论(0) 分类 TED演讲教育篇

Did you ever wonder why sugar dissolves in a cup of coffee? Why not have the sugar just float in the middle of the cup, without dissipating into the coffee? Its because of the way water molecules interact with molecules in other substances. A water m

发表于:2019-03-06 / 阅读(149) / 评论(0) 分类 英语时差8,16
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Afterlehens
anxiety complex
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body refuse
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chipules
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diplomatic protocol
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Early equivalent circuit
electropneumatic signal valve
entotrochanter
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eutamius asiaticuss
ferruginous hawks
finite displacement theory
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Franz Keldysh effect
fundamental input-connection matrix
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i-cheose
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line determination
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lombaardite
Medina Seamount
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mirror interferometer
MMEFR
module dissipation
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patta
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remain in concealment
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spiral head
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to drive a car
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undercapitalizes
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vital communication line
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waveguide coupler