口腔临床英语对话 第6期:牙科手术(1)

Good morning Mrs. Hall. If none of your teeth are bothering you, I'll restore the tooth with the largest cavity. 霍尔太太，早安。 假如你的牙齿不让你难受的话， 那么我就把蛀的最厉害的牙补一补。 This is the tooth th

北师大小学英语六年级下--unit9a

[00:02.18]UNIT 9 Life in the year 2050 [00:07.93]Next Monday,we are going to help clean up the [00:11.40]forest and plant some trees. [00:14.25]You'll need some work gloves. [00:17.08]I don't understand why people leave trash in the [00:20.49]forest.

高中英语人教版必修3 04

[00:06.58]Reading HOW LIFE BEGAN ON THE EARTH [00:11.44]After the Big Bang,the earth was just a cloud of energetic dust. [00:17.08]What it was to become was a mystery until the dust began to slowly combine [00:22.41]into a ball moving around the sun.

美国科学60秒 SSS 2012-09-13

When Pyrex(公司名) cookware first came out, it was advertised as the ice box to oven, because itwas made of borosilicate glass which could weather large temperature changes without undergoing thermo-shock and shattering. But today, Americans Pyrex

美国科学60秒 SSS 2012-09-12

This is scientific American sixty seconds science. I'm Christopher Intagliata. Got a minute? When Pyrex cookware first came out, it was advertised as icebox to oven. Because it was made of borosilicate glass which could weather large temperature chan

60秒科学:Water Blankets Forming Planets

Water Blankets Forming Planets A study in the journal Science finds much more molecular water in regions where planets are forming around young stars. The mechanism to keep the water from being destroyed by UV radiation appears to involve some of the

US Astronomers Find 'Smaller' Planets Around Distant Suns

By David McAlary U.S. astronomers have made a finding they say increases the chance that distant stars may harbor planetary systems like our own. They have discovered two planets the size of Neptune e

2006年VOA标准英语-Solar System Could Gain New Planets Under Defin

By David McAlary Was 16 August 2006 Artist's rendition of solar system There may soon be three new planets in our solar system. The expansion would be the result of a proposed new definition of what a planet is. The change is controversial, but if a

美国国家公共电台 NPR Astronomers Find 7 Earth-Size Planets Around A Nearby Star

AUDIE CORNISH, HOST: Today, scientists announced a big discovery around a star in the constellation Aquarius - seven planets about the size of Earth. And as NPR's Nell Greenfieldboyce reports, they're most likely rocky planets that could be cozy enou

TED演讲:可能存在生命的三颗卫星和一颗行星(4)

A few months ago the fairy tale came true. 几个月前，童话故事成真了！ We announced to the world that we know what these streaks are. It's liquid water. 我们向世界宣布，我们已经知道这些条纹是什么了。是液态水。

TED演讲:可能存在生命的三颗卫星和一颗行星(5)

Cassini just a few months ago also flew through the plume, and it measured silicate particles. 卡西尼太空船几个月前又从这些飞溅的水流中穿过，它检测到了硅酸盐颗粒。 Where does the silica come from? 这些硅从哪来的

纯正英语一分钟-planets

How did all the planets get there? How is it only our planet has life? Will we ever travel to other planets? These are questions I often think about. I think our planet is the best. It looks so beautiful from space with its mixture of blue and green.

听一分钟英文：Planets-星球

How did all the planets get there? How is it only our planet has life? Will we ever travel to other planets? These are questions I often think about. I think our planet is the best. It looks so beautiful from space with its mixture of blue and green.

经济学人133:塑料 旧法新用

Science and Technology Plastics There and back again 科技 塑料 旧法新用 An old idea may help solve the problem of plastic waste 一个老方法也许可以帮助解决塑料垃圾的问题 PLASTICS were once regarded as wonder-materials. They

雅思阅读词汇：火山爆发(四)

manganese n. 锰（元素符号为Mn） mantle composition 覆盖物的成分 Mercury n. 水星 molten v. 溶化；adj. 熔铸的 monitor n. 监视器，监控 mudflow n.[地] 泥流 Neptune n. [天]海王

2006年VOA标准英语-Astronomers Find Signs Planets Might Form

By David McAlary Washington 05 April 2006 New evidence from an orbiting U.S. telescope indicates that planets might rise up out of a dead star's ashes. This is the first time scientists have detected

Huge asteroid will pass closer to Earth than the moon

BEIJING, Nov. 7 (Xinhuanet) -- A huge asteroid will pass closer to Earth than the moon on Tuesday, but experts say there is no cause for alarm. Asteroid 2005 YU 55 will pass about 300-thousand kilometers from the earth. The giant space rock is about

VOA标准英语10月-Snow Falling From Martian Atmosphere

The U.S. space agency NASA's Mars probe Phoenix has detected icy snow falling through the Martian atmosphere. The spacecraft has also discovered material in the planet's soil that is leading scientists a step closer in their conclusion that life pro

Researchers find "lonely planets"

BEIJING, May 20 (Xinhuanet) -- Scientists have discovered a Jupiter-sized exoplanet that is completely unbound from a host star, according the scientific journal Nature published Thursday. The research was conducted by astrophysicists from Osaka Univ

VOA标准英语2010年-Five New Planets Discovered by NASA's

Artist's conception of the Kepler spacecraft, launched in 2008 to identify planets orbiting distant stars Related Links Kepler The planets we found are all hotter than molten lava. ... Looking at them might be like looking at a blast furnace. Scienti