赖世雄学英语第四册 lesson 14

[00:00.00]Lesson 14 Comets [00:02.60]彗星 [00:05.20]In recent scientific investigation of comets has increased [00:14.16]because of a growing interest in the origin of the sun and planets. [00:17.63]近年来，由于对太阳和行星的起源兴趣

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AS IT IS 2015-05-26 Vietnam Slow To Start Up Renewable Energy 越南可再生能源项目启动缓慢 Vietnam might seem to be a good candidate for renewable energy projects. With plenty of sunshine and ocean winds, Vietnam seems like the right place

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This is Scientific Americans' 60-Second Science, I'm Chelsea Wald. Got a minute? Remember the good old days when we understood our solar system? Then we found out Pluto wasn't a planet. And now a new study puts comets in question. The data come from

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Matthew: I heard that you work at an renewable energy company. Can you tell me what kind of company it is? Kat: My company is a wind energy company but there's a lot of other options. Matthew: What are the other options and what are the pros and cons

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The clues are adding up to give a picture of a distant Martian past, when the planet had a thick atmosphere that was warm enough for water to stream on the surface. But now the waters gone, and the atmosphere is so thin that any water would boil away

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This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. If youve ever wondered where the Earth came from, the answer, it seems, is blowin in the windthe solar wind. Or so say scientists who, after examining sola

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But the sun's violent burst can harm us, its active nature is what allows us to live at all, because the sun also eject the solar wind, and energized stream of particles that head out into space, and that we can see passing-off as it bounces off our

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Feed-in tariff program relies on funding from electricity users, not taxpayers Tom Banse | Olympia, Washington 23 March 2010 Proposed solar installation and wind turbine at Gas Works Park in Seattle. National and state governments around the world ha

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To discover why these twin planets followed separate paths and to explore what gave us our precious atmosphere, we have to travel back, back four and a half billion years to the birth of the solar system itself. The birth of the solar system created

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Matthew: I heard that you work at an renewable energy company. Can you tell me what kind of company it is? Kat: My company is a wind energy company but there's a lot of other options. Matthew: What are the other options and what are the pros and cons

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Renewables can depress wholesale prices, eg, when the sun creates a midday jolt. This discourages investors in the flexible, gas-powered generation needed to provide backup for windless, cloudy days. The market dynamics are completely destroyed, says

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But let's pretend again that we have made it to the Oort cloud. The first thing you might notice is how very peaceful it is out here. We're a long way from anywhere nowso far from our own Sun that it's not even the brightest star in the sky. It is a

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HELIGOLAND, Germany Of all the developed nations, few have pushed harder than Germany to find a solution to global warming. And towering symbols of that drive are appearing in the middle of the North Sea. 德国黑尔戈兰岛几乎没有哪个发达国

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The Oort cloud is a spherical haze of comets that surrounds our entire solar system. We often get the false impression that the solar system ends with Pluto. In fact, beyond Pluto is the Oort cloud, encircling everything else like an enormous shell.