单词:earth-layer propagation
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CHAPTER ONE [00:44.25]READING [00:45.74]Page 2 and 3 [00:48.43]THE YOUNG GREEN CONSUMER GUIDE [00:51.51]Review by Tony Ma [00:54.62]This book says that our world is in danger [00:59.32]It is vital that we do something to save the earth [01:04.21]Firs
Topics: American Presidents-Rutherford B. Hayes; emission versus propagation; he/she don't; to do (someone's) bidding Words: slavery to oppose to secede to abolish to run for office to nominate rumor corrupt to uphold to interfere intention to be qua
联合国环境规划署将每年的6月5日确定为世界环境日,希望通过世界环境日主题让人类认识到可持续发展和公平发展的重要性,最终使全人类拥有一个安全而繁荣的未来。 2006年世界环境日庆典
You may have never heard of him, but Thomas Midgley was considered one of the great chemists and inventors of his time. But perhaps no single person in history has done more harm to our earth. While working at a subsidiary of General Motors in 1921 h
There is a special day to recognize the importance of the ozone layer. In 1995, the United Nations General Assembly decided September 16th is the International Day for the Preservation of the Ozone Layer. This is the date on which countries signed th
Today has been warm and sunny throughout the whole country. This is a reminder that in New Zealand we have to be careful to protect ourselves from the harmful UV rays from the sun. The earth is closer to the sun during the southern summer than during
Global Warming and Ozone 全球变暖和臭氧 Could the coming century bring a new threat to the ozone layer? Discover one scientist's model of the effect of global warming and greenhouse gases on ozone -- on today's Earth and Sky. DB: This is Earth and S
Sunscreened Plants 遮光植物 A NASA researcher is finding that alfalfa plants grow more poorly when exposed to UVB -- ultraviolet B radiation from the sun. Learn more about sunscreened plants -- today on Earth and Sky. JB: This is Earth and Sky. Eart
Climate Puzzles 气候之迷 Scientists who predict Earth's future climate wish they knew how climate has changed in the past few thousand years. Learn more about modeling global climate -- today on Earth and Sky. JB: This is Earth and Sky. Most scienti
Moon and Venus月球和金星 The planet Venus is now low in the west after sunset. It's not up for long after the sun goes down, but it's very, very bright. Learn how to see Venus tonight near Earth's companion moon -- today on Earth and Sky. JB: This i
Scientists have found that levels of a now-banned chemical are rising again in Earths atmosphere. The chemical is called CFC-11. It is the second most common kind of CFC, short for chlorofluorocarbon. Chlorofluorocarbons were once widely used in many
Mantle 地幔 We are living on the surface of the Earth. 我们生活在地球表面。 So, what is inside the Earth? 那么,地球内部是什么? There is a mantle under the surface of the Earth. 地球表面以下是地幔。 The mantle takes
The Ozone Layer 臭氧层 Can humans live away from the Earth? 人类能远离地球生活吗? Maybe it will be possible in the future but it is impossible now. 或许将来可以,但现在不行。 In our solar system, the Earth is probably the
By Caty Weaver Broadcast: September 12, 2003 This is Bob Doughty with the VOA Special English Environment Report. Scientists in the United States have reported some good news about the 1)ozone in the
Good News: Earth's Ozone Hole is Healing 好消息:地球臭氧层空洞正在恢复 There is big news about the environment: Scientists say a hole in Earths protective ozone layer is starting to heal. 一则关于环境的重磅新闻来袭:科学家
HARI SREENIVASAN, PBS NEWSHOUR WEEKEND ANCHOR: Scientists studying climate change in Antarctica reported this week that the hole in the protected ozone layer of the earth's atmosphere has shrunk. The discovery of the hole in the mid-1980s led to a wo
The EarthOur Mother Pcople often say that the earth is like our mother. She gives life to all the living things on the earth and provides us with air, food, water and other essential things we need for living. Once she was beautifhl and rich, but no
Why do some governments persist in spending billionsof dollars on space exploration when starvation and poverty continue to gripmany countries throughout the world ? This particular question is being raisedby an ever increasing number of people 。 既