Earth and Sky:Water Cycle 水循环

Water Cycle 水循环 All the oceans on earth are salty, while inland water is typically fresh. How does water become salty? We'll answer a listener's question -- today on Earth and Sky. DB: This is Earth and Sky. We recently visited the Austin Childr

赖世雄高级美国英语 lesson 17

Lesson 17， Precious and Semi-precious Stones 宝石和半宝石 My！ What a beautiful ring you're wearing！ This compliment never fails to flatter and honor the lucky wearer of the ring or other pieces of fewelry bedcked with precious or semi-precious st

NPR 2012-03-10

The US is seeing its strongest three months of hiring since the start of the recession. The Labor Department reports an increase of 227,000 jobs in February. The numbers from the previous two months have also been revised upward. But the unemployment

侏罗纪搏击俱乐部 第72期:巨齿鲨竟无法转弯

Megalodon, fossils are found in the kind of geologic deposits that form pretty close to shore. 能在离海岸非常近的地质沉淀物中，发现巨齿鲨的化石。 So, as far as we know, it was not a deep water kind of species or an open ocean

pbs高端访谈:大峡谷的历史还要往前追溯六千万年?

MARGARET WARNER:Finally tonight: Just how old is the Grand Canyon? The conventional wisdom holds that this natural wonder of the world was shaped by the Colorado River about five or six million years ago. But there's been a long-running debate over w

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

SSS 2009-11-13

Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the

科学家宣布地质纪元进入“人类世”

The 11,700-year-old Holocene epoch is over. We're now living in the Anthropocene epoch. 长达11700年的全新世结束啦。我们如今正生活在人类世纪元。 编者注：全新世（Holocene Epoch），是最年轻的地质年代，它与更

VOA慢速英语2009-Development Report - In India, a Cycle Rickshaw

This the VOA Special English Development Report. Picture a bicycle with a two-wheeled carriage in place of a back tire. India has millions of these cycle rickshaws. The operators are called pullers. They ride through the streets pulling passengers a

TED演讲:探索世界最深洞穴(3)

We're going to be shooting from minus 2,600 meters that's a little over 8,600 feet down at 30 kilometers from the entrance. 我们要从地下2600米处,大约8600多英尺之下--开始拍摄。那个地方离洞口30千米处。 The lead crews will

新西兰英语 179 Seven New Cycle Tracks

The government said that work on the first seven cycle tracks which were promised earlier this year will start in the summer. This will cost $9 million. Another $41 million will be spent later. Together these cycle tracks will be called The Great Rid

MESSENGER Probe Sends First Mercury Images

The U.S. space agency(代理中介) has released the first ever image taken of the surface of Mercury from a spacecraft orbiting the planet. The black and white image, posted on the NASA website Tuesday, shows a surface pocked with craters of varying

NASA Messenger Probe Set for Historic Orbit Around Mercury

The U.S. space agency NASAs Messenger probe（正直的，廉洁的 ） is scheduled to reach Mercury later this week, and become the first spacecraft to orbit the planet closest to the sun. During Messengers year-long orbital mission, scientists exp

科学家宣布地质纪元进入人类世

These are called love tents but they're not what you think. 虽被称为爱的帐篷，但是它们可与你所想不同。 Chinese colleges have come up with an unusual way to help freshmen settle in. 中国的大学别出心裁，以一种特殊的方

TED演讲:地球的年龄有多大(2)

The United States of America's Declaration of Independence would be signed in the last half-inch. 美国的独立宣言签署在最后的半英寸。 Or if we compared geologic time to a woman stretching her arms to a span of six feet, 如果我们将地

2017年CRI Complete Cycle of Beethoven's 9 symphonies continues to show in Beijing

Classical music fans in Beijing are now embracing a massive work-the complete cycle of Beethoven's 9 symphonies with The Deutsche Kammerphilharmonie Bremen. Paavo Jarvi, an internationally famous Estonian conductor, is the artistic director of the or

托福阅读要基于对原文进行推断

其实，推断题没有想象中的那么难，因为托福文章有很清晰的逻辑架构，T(topic)+A(aspect)+A(attitude)的篇章结构和TS(topic sentence)+D(detail)的段落结构是几乎每节课我都会提到的，只有明白了文章的写

TED演讲:用玩具创造世界(5)

Now, as we pull down here, we still have a whole set of creatures living on the surface of the planet. 现在当我摧毁这里的时候，在这个星球上其实还居住着一系列的生物， There are all these different dynamics going on here.

万物简史 第330期:美丽而危险(13)

Eighty million tons of rock, moving at more than one hundred miles an hour, just fell off the mountain, 8000万吨岩石以每小时160公里的速度从山上崩塌下来， traveling with such force and momentum that the leading edge of the landsli

双语有声阅读：板块结构与海床扩展

Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle.The lithosphere is divided