英语 英语 日语 日语 韩语 韩语 法语 法语 德语 德语 西班牙语 西班牙语 意大利语 意大利语 阿拉伯语 阿拉伯语 葡萄牙语 葡萄牙语 越南语 越南语 俄语 俄语 芬兰语 芬兰语 泰语 泰语 泰语 丹麦语 泰语 对外汉语
当前位置:主页 > TAG标签 > 科普英语
  • Earth and Sky:Galactic Rotation 银河系自转

    Galactic Rotation 银河系自转 Astronomers calculate there is ten times more matter in our Milky Way galaxy than we can actually see. Discover how the orbital motions of stars in the galaxy reveal dark matter -- on today's Earth and Sky. JB: I'm Joel...

  • Earth and Sky:Titicaca Reedbeds 的的喀喀湖的芦苇地

    Titicaca Reedbeds 的的喀喀湖的芦苇地 An ancient lake high in the mountains of South America holds lessons about indigenous peoples and sustainability. Discover Lake Titicaca -- today on Earth and Sky. DB: This is Earth and Sky. Lake Titicaca is high...

  • Earth and Sky:Climate Puzzles 气候之迷

    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...

  • Earth and Sky:Moon and Jupiter 月球和木星

    Moon and Jupiter 月球和木星 After traveling behind the sun for several months, the planet Jupiter is now visible again, just before sunup. Learn how to see Jupiter near the waning moon on Wednesday morning -- on today's Earth and Sky. JB: This is Ea...

  • Earth and Sky:Sunscreened Plants 遮光植物

    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...

  • Earth and Sky:Global Warming and Ozone 全球变暖和臭氧

    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...

  • Earth and Sky:Fire Cycle 火灾规律

    Fire Cycle 火灾规律 The El Nino phenomenon of 1997-98 unleashed torrential rain in some parts of the world, while creating abnormally dry conditions in others. And it sparked record numbers of wildfires. Learn more about climate and wildfire -- toda...

  • Earth and Sky:Fire Regime 火

    Fire Regime 火 Fire was a creation of life -- born from oxygen and organic matter -- ignited by lightning. Thus fire has been a fundamental feature of the Earth for at least 400 million years. A scientist talks about fire -- today on Earth and Sky....

  • Earth and Sky:Sierra Treeline 山脊树林

    Sierra Treeline 山脊树林 Could global warming allow forests to expand into higher elevations than they have reached in more than a thousand years? Learn more about studying alpine treelines -- today on Earth and Sky. JB: This is Earth and Sky. The h...

  • Earth and Sky:Black and White 黑与白

    Black and White黑与白 Sometimes you hear it said that white is a combination of all the colors of the rainbow -- and that black is the absence of color. Find out more about whether black and white are colors -- today on Earth and Sky. JB: This is Ear...

听力搜索