[医] 水中溶解氧

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.....green plants ultimately. When it first appeared therefore, it would have been seen as a poison, it would have been a pollutant. But gradually, through Darwinian natural selection, living organism

发表于:2018-12-07 / 阅读(103) / 评论(0)

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UNIT 4 Look into Science! Lesson 30: Keep the Candle Burning

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发表于:2018-12-13 / 阅读(161) / 评论(0)

河北教育初中英语（初中起点）八年级下册

SSS 2011-01-25

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. The Chesapeake Bay could get helped by a new antipollution expert: farmed oysters. For decades, the Chesapeake has been plagued by excess nutrients, such

发表于:2018-12-24 / 阅读(96) / 评论(0)

Scientific American(一)月

SSS 2012-06-27

Every time you inhale, oxygen passes from your windpipe to your lungs and on into your bloodstream. But what if your windpipe was blocked? Getting the gas straight to your blood could save your life. Wait, put down that syringea large air bubble in a

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Scientific American(六)月

英语听书《海底两万里》第472期第29章缺少空气(4)

I didn't tell my two companions about this new danger. 我并不让我的两个同伴知道这个危险。 There was no point in dampening the energy they were putting into our arduous rescue work. 以免他们做这种辛苦救护工作的勇气受到

发表于:2018-12-31 / 阅读(64) / 评论(0)

《海底两万里》中英双语有声读物

英语访谈对话 36 Spear Fishing

Todd: OK, Michael, you are into spear fishing! Michael: Yes, I enjoy going spear fishing Todd: OK. Can you talk about that a bit. Michael: Yeah, sure. Spear fishing basically is a sport that you dive under the wate with the aid of flippers, wet suit

发表于:2019-01-02 / 阅读(100) / 评论(0)

英语访谈对话

VOA慢速英语20060830b

EXPLORATIONS - 'Houston, We've Had a Problem Here': The Survival of Apollo 13By Marilyn Rice Christiano and directed by Paul Thompson Broadcast: Wednesday, August 30, 2006 ANNOUNCER: EXPLORATIONS -- a

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2006年慢速英语（八）月

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Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t

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火星生命

VOA慢速英语2018 研究显示：海洋面临严重威胁

Several Studies Show Oceans Face Serious Threats The worlds oceans are sick, and getting sicker every day. 世界海洋环境堪忧，而且日趋恶化。 Two new studies show the warming of Earths atmosphere is removing oxygen from ocean waters and

发表于:2019-01-03 / 阅读(148) / 评论(0)

2018年VOA慢速英语(二)月

SSS 2008-08-01

This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan

发表于:2019-01-04 / 阅读(127) / 评论(0)

Scientific American(八)月

SSS 2010-04-14

One main goal in the renewable energy field is to find an efficient, inexpensive way to split water into hydrogen and oxygen. The hydrogen could then be used as a fuel source for vehicles or fuel cells. Typically, an electric current breaks the water

发表于:2019-01-08 / 阅读(126) / 评论(0)

Scientific American(四)月

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UNIT 4 [00:03.08]Lessons 25~32 [00:08.05]Look into Science! [00:11.89]Lesson 25: [00:16.64]Keep the Candle Burning!Science is so interesting! [00:23.72]I'm sure you'll like this experiment! [00:28.68]When you do this experiment,you will learn somethi

发表于:2019-01-09 / 阅读(291) / 评论(0)

河北加拿大版初中英语

与美国小学生一起学英文第5册第2期:火星

Mars 火星 Mars is a planet. 火星是行星。 It is next to the Earth. 它紧邻地球。 Its size is about one fourth of the Earth. 它约有四分之一个地球大。 Mars is not far from the Earth, but the environment is very different. 火星离

发表于:2019-01-10 / 阅读(83) / 评论(0)

与美国小学生一起学英文第5册

浮游生物比科学家认为的重要的多

Plankton More Important than Scientists Thought 浮游生物比科学家认为的重要的多 For years, most people thought of small organisms called plankton as food for whales and other large sea animals. But a four-year long study discovered that

发表于:2019-01-12 / 阅读(89) / 评论(0)

2015年VOA慢速英语(六)月

实战口语情景对话第36期:捕鱼 Spear Fishing

Todd: OK, Michael, you are into spear fishing! 好的，迈克尔，你喜欢捕鱼！ Michael: Yes, I enjoy going spear fishing. 是的，我喜欢捕鱼。 Todd: OK. Can you talk about that a bit. 好的，你能跟我们聊聊捕鱼吗。 Michael:

发表于:2019-01-15 / 阅读(94) / 评论(0)

实战口语情景对话

英文原版对话1000个:1036 Spear Fishing

发表于:2019-01-20 / 阅读(78) / 评论(0)

原版英语对话1000个

英语听力：探索发现科学新发现：我们的大气层-9

We were left with this atmosphere made of molten rock and vaporous rock. It took millions of years for that atmosphere to fall out and to be replaced by an atmosphere made up of nitrogen and carbon dioxide and water vapour. These new gases came from

发表于:2019-01-23 / 阅读(98) / 评论(0)

探索与发现2014年

AGRICULTURE REPORT - Compost: an Organic Way to Better Soil

AGRICULTURE REPORT - Compost: an Organic Way to Better Soil and Crops By Gary Garriott Broadcast: Tuesday, July 05, 2005 I'm Gwen Outen with the VOA Special English Agriculture Report. Many farmers im

发表于:2019-01-30 / 阅读(178) / 评论(0)

农业与发展

奥迪用“空气和水”合成新燃料

German Car Manufacturer Audi Creates Fuel From Air And Water 奥迪用空气和水合成新燃料 Creating an alternative green or carbon neutral fuel to replace gasoline has been the holy grail for scientists for many years. However, while there has

发表于:2019-02-05 / 阅读(88) / 评论(0)

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Anniversaries were few and far between in the Archaean world. 在太古代的世界里，结婚周年纪念日是完全没有的。 For two billion years bacterial organisms were the only forms of life. 在20亿年时间里，细菌是惟一的生命形

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