光线发射

Supermassive Black Holes 超大质量黑洞 - 14

It means that Silk and Ree's theory may be right and if it is also right that supermassive black holes helped trigger star formation, then it must mean that all giant black holes and their galaxies ar

发表于:2018-12-07 / 阅读(373) / 评论(0)

超大质量黑洞

新概念英语第四册Lesson 43 Are there strangers in spac

Lesson 43 Are there strangers in space? 宇宙中有外星人吗？ First listen and then answer the following question. 听录音，然后回答以下问题。 What does the 'uniquely rational way' for us to communicate with other intelligent beings

发表于:2018-12-08 / 阅读(659) / 评论(0)

新概念英语第四册

VOA慢速英语2013 EXPLORATIONS - The History of the Laser

EXPLORATIONS - The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can

发表于:2018-12-16 / 阅读(160) / 评论(0)

2013年VOA慢速英语(二)月

英闻天下——573 Beijing's New Emission Standard Begins Feb 1

The capital will raise its automobile-emission standards on Friday, making them the strictest in the nation. The Beijing Environmental Protection Bureau said the move is expected to reduce auto pollution by 40 percent to better improve the hazardous

发表于:2018-12-19 / 阅读(149) / 评论(0)

英闻天下

趣味青春英语第150期:On my back

Idiom: On my back 一个人不停地对某人唠叨 Hit the book: Harness Sustainable Emission Inexhaustible Mitigate Turbine

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趣味青春英语

2006年NPR美国国家公共电台六月-Clean Trucks, Clean Emissions

Diesel fuel in the US and the fumes from diesel engines are about to get a whole lot cleaner. As of today, the Environmental Protection Agency is requiring much of the diesel in the country to have 97% less sulfur in it. It's the start of a project

发表于:2019-01-07 / 阅读(271) / 评论(0)

2006年NPR美国国家公共电台

SSS 2012-03-15

This is Scientific American 60 Second Science, I am Karen Hopkin, this will just take a minute. Every year, about 10 million tons of paper winds up in American landfills and incinerators, which is not only wasteful but adds CO2 to the atmosphere. Rec

发表于:2019-01-08 / 阅读(172) / 评论(0)

Scientific American(三)月

VOA标准英语2013--The History of the Laser

The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can go from the sci

发表于:2019-01-12 / 阅读(228) / 评论(0)

2013年VOA慢速英语(五)月

VOA慢速英语2012--The Laser: Futuristic Science Found at Your Local Store

EXPLORATIONS - The Laser: Futuristic Science Found at Your Local Store MARIO RITTER: Welcome to EXPLORATIONS in VOA Special English.Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one

发表于:2019-01-12 / 阅读(192) / 评论(0)

2012年VOA慢速英语(一)月

VOA慢速英语2010年-EXPLORATIONS - After 50 Years, Lasers

STEVE EMBER: Im Steve Ember. FAITH LAPIDUS: And Im Faith Lapidus with EXPLORATIONS in VOA Special English. This week, we tell about one of the most recognizable objects in science fiction the laser. And we tell how the laser has made its mark in the

发表于:2019-01-12 / 阅读(147) / 评论(0)

2010年VOA慢速英语(九)月

VOA标准英语2010年-Non-binding Copenhagen Agreement Facin

Negotiators at the climate summit in Copenhagen last month failed to agree on a new climate change treaty to replace the current Kyoto Protocol before it expires in 2012. Jonathan Lash is president of World Resources Institute, an environmental polic

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VOA标准英语2010年(一月)

VOA标准英语2009年-India Satisfied with Copenhagen Summit

India says it is satisfied with outcome of the recent climate summit at Copenhagen, which did not spell out specific targets for reducing carbon emissions. India is hailing the united position adopted by big developing countries at the summit. Anjana

发表于:2019-01-13 / 阅读(181) / 评论(0)

VOA标准英语2009年(十二月)

VOA常速英语2007年-US, EU Deadlock Over Emission Cuts May Derail C

By Nancy-Amelia Collins Bali, Indonesia 13 December 2007 The head of the United Nations Climate Change Conference is warning that a deadlock between the United States and the European Union over greenhouse gas emission targets may derail the conferen

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VOA常速英语2007年（十二月）

2015年CRI National Carbon Emission Trading Market Planed for 2017

Briefing a news conference on Thursday, Xie Zhenhua, China's special representative on climate change, said the country is exploring emissions trading mechanisms. China now is piloting emission trading in seven provinces or municipalities, and the wo

发表于:2019-01-19 / 阅读(183) / 评论(0)

2015CRI中国国际广播电台

【英语语言学习】镭射器的历史

Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can go from the science of the future to eve

发表于:2019-01-24 / 阅读(241) / 评论(0)

英语语言学习

英语听力：自然百科金星和水星旅行指南 Venus and Mercury-8

Reason/ you are going to go to Mercury as a travel destination would be this night sight view because it's going to be highly unique in the solar system. You have sodium thats atoms that are streaming off and giving enough to see yellow light, so you

发表于:2019-02-05 / 阅读(184) / 评论(0)

自然百科2012年

英语听书《海底两万里》第299期第22章强逼睡眠(4)

My companions and I then witnessed an unusual sight. The panels in the lounge were open, and since the Nautilus's beacon was off, 我的同伴和我，在这时亲眼看到一种很新奇的景象。客厅的嵌板敞开，由于诺第留斯号的探照

发表于:2019-02-17 / 阅读(131) / 评论(0)

《海底两万里》中英双语有声读物

英国政府力推电动汽车

By announcing a 57-million US dollar extension of its current programme, the UK is signaling that it wants to make electric cars a mainstream option for car buyers. The money will go towards four areas, with proposals like building street lights that

发表于:2019-02-18 / 阅读(190) / 评论(0)

英语新闻

CCTV9英语新闻：Golmud refinery working to meet emission standards

China is now on the front lines of efforts to develop energy sources that can balance the goals of sustaining economic growth and protecting the environment. Decisive action is needed to strengthen policy frameworks across the country to reach that g

发表于:2019-02-18 / 阅读(173) / 评论(0)

cctv9英语新闻2015年

英闻天下——214 Beijing's New Emission Standard Begins Feb 1

发表于:2019-02-21 / 阅读(194) / 评论(0)

英闻天下

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antoni van leeuwenhoek