标签：earth 相关文章

Earth and Sky:Electric Fish 发电鱼

Electric Fish 发电鱼 One way that Harold Zakon and his team find fish to study is to put electrical detectors into the bottom of murky streams in Venezuela. This works because certain fish emit pulses of electricity. Discover electric fish -- on tod

发表于:2018-12-07 / 阅读(73) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Estrogen Mimics 雌性激素

Estrogen Mimics 雌性激素 It may not surprise you that pollution from chemical plants and farms can harm fish. But there's growing evidence that we're all hurting fish and frogs by what we flush down the drain. Discover estrogen mimics -- today on Ea

发表于:2018-12-07 / 阅读(52) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Narrowing Uncertainties 新发现

Narrowing Uncertainties 新发现 In science, theories abound. Some are proven true, some are modified, some are completely abandoned. But even discrediting a theory is progress. Learn more about sorting through the uncertainties -- on today's Earth an

发表于:2018-12-07 / 阅读(53) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Amazon Trends 亚马逊河流域

Amazon Trends 亚马逊河流域 More than 1/3 of Earth's species -- and about 30% of the total living plants and animals on Earth -- live in the Amazon. Discover a noted scientist's perspective on the perils and promise of this region -- today on Earth a

发表于:2018-12-07 / 阅读(50) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Spider Widows 蜘蛛寡妇

Spider Widows 蜘蛛寡妇 Spiders give many of us the shivers, though they usually leave people alone. Sometimes these spectacular predators instead prey on each other. Learn more about when spiders serve themselves as dinner -- today on Earth and Sky.

发表于:2018-12-07 / 阅读(54) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Aqua Spacecraft 水资源监测太空船

Aqua Spacecraft 水资源监测太空船 NASA's latest and most ambitious weather satellite is measuring Earth's water cycle. Learn more about the Aqua satellite -- today on Earth and Sky. DB: I'm Deborah Byrd. JB: And I'm Joel Block for Earth and Sky. This

发表于:2018-12-07 / 阅读(68) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Acid Rain 酸雨

Acid Rain 酸雨 Damage from acid rain is widespread - not just in eastern North America, but throughout Europe, Japan, China, and Southeast Asia. Is the rain that's falling on your umbrella acidic? A listener's question -- on today's Earth and Sky. J

发表于:2018-12-07 / 阅读(190) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Politics of CO2 二氧化碳的影响

Politics of CO2 二氧化碳的影响 Mention global warming to a room full of politicians, and you might just start an argument. But one thing most everyone can agree on is the need for more research. Learn more about the next phase of climate study -- to

发表于:2018-12-07 / 阅读(118) / 评论(0) 分类 (科普英语)Earth and Sky

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

发表于:2019-01-02 / 阅读(165) / 评论(0) 分类 (科普英语)Earth and Sky

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

发表于:2019-01-02 / 阅读(145) / 评论(0) 分类 (科普英语)Earth and Sky

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

发表于:2019-01-02 / 阅读(141) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Moon and Venus月球和金星

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

发表于:2019-01-02 / 阅读(144) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Aqua Technology 水资源监测科技

Aqua Technology 水资源监测科技 A new weather-monitoring satellite has been 30 years in the making, and some researchers think it's worth the wait. We'll speak with a scientist about the Aqua satellite -- on today's Earth and Sky. DB: This is Earth a

发表于:2019-01-02 / 阅读(143) / 评论(0) 分类 (科普英语)Earth and Sky

Earth and Sky:Harvest Moon 秋分前后之满月

Harvest Moon 秋分前后之满月 Right now, as seen from the northern hemisphere, the ecliptic -- or path of the sun, moon and planets -- makes a narrow angle with the evening horizon. Learn more about the ecliptic -- and the Harvest Moon -- today on Ear

发表于:2019-01-02 / 阅读(147) / 评论(0) 分类 (科普英语)Earth and Sky

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

发表于:2019-01-02 / 阅读(174) / 评论(0) 分类 (科普英语)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

发表于:2019-01-02 / 阅读(152) / 评论(0) 分类 (科普英语)Earth and Sky

英语杂谈：68 The earth hour

China participated for the first time in the World Earth Hour campaign Saturday night by switching off all unnecessary lighting in residential, business and public venues, including iconic Olympic landmarks such as the Bird's Nest Stadium and Water C

发表于:2019-01-09 / 阅读(70) / 评论(0) 分类 英语杂谈

SCIENCE IN THE NEWS - Scientists Find Most Earth-Like Planet

SCIENCE IN THE NEWS - Scientists Find Most Earth-Like Planet Yet Discovered By Dana Demange, Cynthia Kirk, ... Broadcast: Tuesday, June 28, 2005 (MUSIC) VOICE ONE: This is SCIENCE IN THE NEWS, in VOA

发表于:2019-01-11 / 阅读(78) / 评论(0) 分类 科技之光

VOA常速英语2008年-World Celebrates Earth Day

By Paul Sisco Washington 22 April 2008 Today, April 22 is Earth Day, a global event that began in 1970 and is credited by some with giving birth to the modern environmental movement. Earth Day grew from an annual event in the United States to a globa

发表于:2019-01-31 / 阅读(61) / 评论(0) 分类 VOA常速英语2008年（四月）

China's rare earth policy justified: spokesman

BEIJING, March 15 (Xinhua) -- China's restrictions on rare earth exports are justified and are in line with World Trade Organization rules, Shen Danyang, spokesman for the Ministry of Commerce, said Thursday. The policy aims to protect resources and

发表于:2019-02-08 / 阅读(66) / 评论(0) 分类 英语新闻
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